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15242102240 = 255122377893
BaseRepresentation
bin11100011001000000…
…00000010111100000
31110100020201000112012
432030200000113200
5222203434232430
611000243052052
71046466505601
oct161440002740
943306630465
1015242102240
116511851012
122b54671028
13158ba54a11
14a48445da8
155e31d8695
hex38c8005e0

15242102240 has 48 divisors (see below), whose sum is σ = 36039372768. Its totient is φ = 6091777536.

The previous prime is 15242102189. The next prime is 15242102243. The reversal of 15242102240 is 4220124251.

It is a super-2 number, since 2×152421022402 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15242102243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156734 + ... + 234626.

It is an arithmetic number, because the mean of its divisors is an integer number (750820266).

Almost surely, 215242102240 is an apocalyptic number.

15242102240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15242102240 is an abundant number, since it is smaller than the sum of its proper divisors (20797270528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15242102240 is a wasteful number, since it uses less digits than its factorization.

15242102240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79131 (or 79123 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 15242102240 its reverse (4220124251), we get a palindrome (19462226491).

The spelling of 15242102240 in words is "fifteen billion, two hundred forty-two million, one hundred two thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 1223 2446 4892 6115 9784 12230 19568 24460 39136 48920 77893 97840 155786 195680 311572 389465 623144 778930 1246288 1557860 2492576 3115720 6231440 12462880 95263139 190526278 381052556 476315695 762105112 952631390 1524210224 1905262780 3048420448 3810525560 7621051120 15242102240