51920627931 has 6 divisors (see below), whose sum is σ = 74996462580. Its totient is φ = 34613751948.

The previous prime is 51920627903. The next prime is 51920627947. The reversal of 51920627931 is 13972602915.

It is a happy number.

51920627931 is a `hidden beast` number, since 5 + 19 + 2 + 0 + 627 + 9 + 3 + 1 = 666.

It is not a de Polignac number, because 51920627931 - 2¹⁰ = 51920626907 is a prime.

It is a super-2 number, since 2×51920627931² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51920627131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2884479321 + ... + 2884479338.

It is an arithmetic number, because the mean of its divisors is an integer number (12499410430).

Almost surely, 2^51920627931 is an apocalyptic number.

51920627931 is a deficient number, since it is larger than the sum of its proper divisors (23075834649).

51920627931 is a wasteful number, since it uses less digits than its factorization.

51920627931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768958665 (or 5768958662 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 51920627931 in words is "fifty-one billion, nine hundred twenty million, six hundred twenty-seven thousand, nine hundred thirty-one".