51512531512 has 32 divisors (see below), whose sum is σ = 104713812000. Its totient is φ = 23615443584.

The previous prime is 51512531501. The next prime is 51512531533. The reversal of 51512531512 is 21513521515.

It is a super-2 number, since 2×51512531512² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646628 + ... + 1677619.

It is an arithmetic number, because the mean of its divisors is an integer number (3272306625).

Almost surely, 2^51512531512 is an apocalyptic number.

51512531512 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51512531512 is an abundant number, since it is smaller than the sum of its proper divisors (53201280488).

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

51512531512 is a wasteful number, since it uses less digits than its factorization.

51512531512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324415 (or 3324411 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The spelling of 51512531512 in words is "fifty-one billion, five hundred twelve million, five hundred thirty-one thousand, five hundred twelve".