51731303400 has 384 divisors, whose sum is σ = 205942176000. Its totient is φ = 11690680320.

The previous prime is 51731303389. The next prime is 51731303497. The reversal of 51731303400 is 430313715.

51731303400 is a `hidden beast` number, since 5 + 1 + 7 + 313 + 0 + 340 + 0 = 666.

It is a super-2 number, since 2×51731303400² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3356512 + ... + 3371888.

It is an arithmetic number, because the mean of its divisors is an integer number (536307750).

Almost surely, 2^51731303400 is an apocalyptic number.

51731303400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51731303400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102971088000).

51731303400 is an abundant number, since it is smaller than the sum of its proper divisors (154210872600).

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

51731303400 is a wasteful number, since it uses less digits than its factorization.

51731303400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15498 (or 15483 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The spelling of 51731303400 in words is "fifty-one billion, seven hundred thirty-one million, three hundred three thousand, four hundred".