51523131 has 12 divisors (see below), whose sum is σ = 75511016. Its totient is φ = 31225920.

The previous prime is 51523127. The next prime is 51523133. The reversal of 51523131 is 13132515.

51523131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51523131 - 2² = 51523127 is a prime.

It is a super-2 number, since 2×51523131² = 5309266056086322, 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 = 51523098 and 51523107.

It is not an unprimeable number, because it can be changed into a prime (51523133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70606 + ... + 71331.

Almost surely, 2^51523131 is an apocalyptic number.

51523131 is a deficient number, since it is larger than the sum of its proper divisors (23987885).

51523131 is a wasteful number, since it uses less digits than its factorization.

51523131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141962 (or 141951 counting only the distinct ones).

The product of its digits is 450, while the sum is 21.

The square root of 51523131 is about 7177.9614794174. The cubic root of 51523131 is about 372.1066363847.

Adding to 51523131 its reverse (13132515), we get a palindrome (64655646).

The spelling of 51523131 in words is "fifty-one million, five hundred twenty-three thousand, one hundred thirty-one".