51699542931 has 6 divisors (see below), whose sum is σ = 74677117580. Its totient is φ = 34466361948.

The previous prime is 51699542861. The next prime is 51699542957. The reversal of 51699542931 is 13924599615.

51699542931 is a `hidden beast` number, since 5 + 1 + 6 + 9 + 9 + 542 + 93 + 1 = 666.

It is not a de Polignac number, because 51699542931 - 2⁷ = 51699542803 is a prime.

It is a super-2 number, since 2×51699542931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51699542981) 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, 2872196821 + ... + 2872196838.

Almost surely, 2^51699542931 is an apocalyptic number.

51699542931 is a deficient number, since it is larger than the sum of its proper divisors (22977574649).

51699542931 is a wasteful number, since it uses less digits than its factorization.

51699542931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744393665 (or 5744393662 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

It can be divided in two parts, 5169 and 9542931, that added together give a square (9548100 = 3090²).

The spelling of 51699542931 in words is "fifty-one billion, six hundred ninety-nine million, five hundred forty-two thousand, nine hundred thirty-one".