51515517201512 has 64 divisors (see below), whose sum is σ = 119023659014400. Its totient is φ = 20355474263040.

The previous prime is 51515517201481. The next prime is 51515517201559. The reversal of 51515517201512 is 21510271551515.

It is a super-2 number, since 2×51515517201512² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51515517201512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41560289 + ... + 42781872.

It is an arithmetic number, because the mean of its divisors is an integer number (1859744672100).

Almost surely, 2^{51515517201512} is an apocalyptic number.

51515517201512 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51515517201512 is an abundant number, since it is smaller than the sum of its proper divisors (67508141812888).

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

51515517201512 is a wasteful number, since it uses less digits than its factorization.

51515517201512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84343026 (or 84343022 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 41.

The spelling of 51515517201512 in words is "fifty-one trillion, five hundred fifteen billion, five hundred seventeen million, two hundred one thousand, five hundred twelve".