51731042400 has 108 divisors (see below), whose sum is σ = 182416613652. Its totient is φ = 13794942720.

The previous prime is 51731042399. The next prime is 51731042431. The reversal of 51731042400 is 424013715.

51731042400 is a `hidden beast` number, since 517 + 3 + 104 + 2 + 40 + 0 = 666.

It is a super-2 number, since 2×51731042400² (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 17 ways as a sum of consecutive naturals, for example, 3585234 + ... + 3599633.

It is an arithmetic number, because the mean of its divisors is an integer number (1689042719).

Almost surely, 2^51731042400 is an apocalyptic number.

51731042400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51731042400 is an abundant number, since it is smaller than the sum of its proper divisors (130685571252).

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

51731042400 is a wasteful number, since it uses less digits than its factorization.

51731042400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184893 (or 7184877 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The spelling of 51731042400 in words is "fifty-one billion, seven hundred thirty-one million, forty-two thousand, four hundred".