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30525243231 = 37172191012621
BaseRepresentation
bin11100011011011100…
…100011111101011111
32220210100122000122010
4130123130203331133
51000003430240411
622004553522303
72130305200140
oct343334437537
986710560563
1030525243231
1111a4478204a
125abaa13393
132b56148002
1416980d1ac7
15bd9ccb7a6
hex71b723f5f

30525243231 has 96 divisors (see below), whose sum is σ = 52547397120. Its totient is φ = 15393024000.

The previous prime is 30525243223. The next prime is 30525243233. The reversal of 30525243231 is 13234252503.

It is not a de Polignac number, because 30525243231 - 23 = 30525243223 is a prime.

It is a super-3 number, since 3×305252432313 (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30525243233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11645101 + ... + 11647721.

It is an arithmetic number, because the mean of its divisors is an integer number (547368720).

Almost surely, 230525243231 is an apocalyptic number.

30525243231 is a deficient number, since it is larger than the sum of its proper divisors (22022153889).

30525243231 is a wasteful number, since it uses less digits than its factorization.

30525243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 30525243231 its reverse (13234252503), we get a palindrome (43759495734).

The spelling of 30525243231 in words is "thirty billion, five hundred twenty-five million, two hundred forty-three thousand, two hundred thirty-one".

Divisors: 1 3 7 17 19 21 51 57 101 119 133 289 303 323 357 399 707 867 969 1717 1919 2023 2121 2261 2621 5151 5491 5757 6069 6783 7863 12019 13433 16473 18347 29189 32623 36057 38437 40299 44557 49799 55041 87567 97869 115311 133671 149397 204323 228361 264721 311899 348593 554591 612969 685083 757469 794163 846583 935697 1045779 1663773 1853047 2272407 2539749 3882137 4500257 5029699 5302283 5559141 5926081 11646411 13500771 14391911 15089097 15906849 17778243 31501799 35207893 43175733 76504369 85504883 94505397 100743377 105623679 229513107 256514649 302230131 535530583 598534181 1453583011 1606591749 1795602543 4360749033 10175081077 30525243231