51531554600 has 48 divisors (see below), whose sum is σ = 119825887200. Its totient is φ = 20610037440.

The previous prime is 51531554551. The next prime is 51531554629. The reversal of 51531554600 is 645513515.

It is a super-2 number, since 2×51531554600² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2860421 + ... + 2878379.

It is an arithmetic number, because the mean of its divisors is an integer number (2496372650).

Almost surely, 2^51531554600 is an apocalyptic number.

51531554600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51531554600 is an abundant number, since it is smaller than the sum of its proper divisors (68294332600).

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

51531554600 is a wasteful number, since it uses less digits than its factorization.

51531554600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32322 (or 32313 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 51531554600 in words is "fifty-one billion, five hundred thirty-one million, five hundred fifty-four thousand, six hundred".