51156731700 has 108 divisors (see below), whose sum is σ = 163759727040. Its totient is φ = 13351533120.

The previous prime is 51156731669. The next prime is 51156731713. The reversal of 51156731700 is 713765115.

51156731700 is a `hidden beast` number, since 511 + 5 + 6 + 73 + 1 + 70 + 0 = 666.

It is a super-2 number, since 2×51156731700² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 562390 + ... + 646989.

Almost surely, 2^51156731700 is an apocalyptic number.

51156731700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51156731700 is an abundant number, since it is smaller than the sum of its proper divisors (112602995340).

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

51156731700 is a wasteful number, since it uses less digits than its factorization.

51156731700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209446 (or 1209436 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The spelling of 51156731700 in words is "fifty-one billion, one hundred fifty-six million, seven hundred thirty-one thousand, seven hundred".