51316131 has 8 divisors (see below), whose sum is σ = 72022720. Its totient is φ = 32410152.

The previous prime is 51316123. The next prime is 51316141. The reversal of 51316131 is 13161315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51316131 - 2³ = 51316123 is a prime.

It is a super-2 number, since 2×51316131² = 5266690601618322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51316098 and 51316107.

It is not an unprimeable number, because it can be changed into a prime (51316121) 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, 450085 + ... + 450198.

It is an arithmetic number, because the mean of its divisors is an integer number (9002840).

Almost surely, 2^51316131 is an apocalyptic number.

51316131 is a deficient number, since it is larger than the sum of its proper divisors (20706589).

51316131 is a wasteful number, since it uses less digits than its factorization.

51316131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900305.

The product of its digits is 270, while the sum is 21.

The square root of 51316131 is about 7163.5278320113. The cubic root of 51316131 is about 371.6076407120.

Adding to 51316131 its reverse (13161315), we get a palindrome (64477446).

It can be divided in two parts, 51 and 316131, that multiplied together give a triangular number (16122681 = T₅₆₇₈).

The spelling of 51316131 in words is "fifty-one million, three hundred sixteen thousand, one hundred thirty-one".