51313142531 has 16 divisors (see below), whose sum is σ = 61273870848. Its totient is φ = 42015019200.

The previous prime is 51313142527. The next prime is 51313142563. The reversal of 51313142531 is 13524131315.

It is not a de Polignac number, because 51313142531 - 2² = 51313142527 is a prime.

It is a super-2 number, since 2×51313142531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51313142494 and 51313142503.

It is not an unprimeable number, because it can be changed into a prime (51313142521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86885 + ... + 331926.

It is an arithmetic number, because the mean of its divisors is an integer number (3829616928).

Almost surely, 2^51313142531 is an apocalyptic number.

51313142531 is a deficient number, since it is larger than the sum of its proper divisors (9960728317).

51313142531 is a wasteful number, since it uses less digits than its factorization.

51313142531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419602.

The product of its digits is 5400, while the sum is 29.

Adding to 51313142531 its reverse (13524131315), we get a palindrome (64837273846).

The spelling of 51313142531 in words is "fifty-one billion, three hundred thirteen million, one hundred forty-two thousand, five hundred thirty-one".