51711815400 has 192 divisors, whose sum is σ = 191173478400. Its totient is φ = 11305916160.

The previous prime is 51711815383. The next prime is 51711815401. The reversal of 51711815400 is 451811715.

It is a super-2 number, since 2×51711815400² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51711815401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 171060 + ... + 364259.

It is an arithmetic number, because the mean of its divisors is an integer number (995695200).

Almost surely, 2^51711815400 is an apocalyptic number.

51711815400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51711815400 is an abundant number, since it is smaller than the sum of its proper divisors (139461663000).

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

51711815400 is a wasteful number, since it uses less digits than its factorization.

51711815400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535368 (or 535359 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 33.

The spelling of 51711815400 in words is "fifty-one billion, seven hundred eleven million, eight hundred fifteen thousand, four hundred".