51931136572 has 24 divisors (see below), whose sum is σ = 103905486720. Its totient is φ = 22246941360.

The previous prime is 51931136519. The next prime is 51931136573. The reversal of 51931136572 is 27563113915.

It is a super-2 number, since 2×51931136572² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51931136573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317122 + ... + 452137.

It is an arithmetic number, because the mean of its divisors is an integer number (4329395280).

Almost surely, 2^51931136572 is an apocalyptic number.

It is an amenable number.

51931136572 is an abundant number, since it is smaller than the sum of its proper divisors (51974350148).

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

51931136572 is a wasteful number, since it uses less digits than its factorization.

51931136572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771681 (or 771679 counting only the distinct ones).

The product of its digits is 170100, while the sum is 43.

The spelling of 51931136572 in words is "fifty-one billion, nine hundred thirty-one million, one hundred thirty-six thousand, five hundred seventy-two".