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30302003231 = 47644723473
BaseRepresentation
bin11100001110001000…
…111110000000011111
32220012210120020220222
4130032020332000133
5444024303100411
621530501031555
72121624530513
oct341610760037
986183506828
1030302003231
111193a766585
125a580b55bb
132b1bb14936
1416765c0143
15bc53d14db
hex70e23e01f

30302003231 has 4 divisors (see below), whose sum is σ = 30946726752. Its totient is φ = 29657279712.

The previous prime is 30302003213. The next prime is 30302003261. The reversal of 30302003231 is 13230020303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13230020303 = 36373637619.

It is a cyclic number.

It is not a de Polignac number, because 30302003231 - 226 = 30234894367 is a prime.

It is a super-2 number, since 2×303020032312 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30302003261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322361690 + ... + 322361783.

It is an arithmetic number, because the mean of its divisors is an integer number (7736681688).

Almost surely, 230302003231 is an apocalyptic number.

30302003231 is a deficient number, since it is larger than the sum of its proper divisors (644723521).

30302003231 is an equidigital number, since it uses as much as digits as its factorization.

30302003231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644723520.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 30302003231 its reverse (13230020303), we get a palindrome (43532023534).

The spelling of 30302003231 in words is "thirty billion, three hundred two million, three thousand, two hundred thirty-one".

Divisors: 1 47 644723473 30302003231