51232131 has 12 divisors (see below), whose sum is σ = 75215920. Its totient is φ = 33594480.

The previous prime is 51232091. The next prime is 51232133. The reversal of 51232131 is 13123215.

It is not a de Polignac number, because 51232131 - 2⁷ = 51232003 is a prime.

It is a super-2 number, since 2×51232131² = 5249462493602322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51232133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46111 + ... + 47208.

Almost surely, 2^51232131 is an apocalyptic number.

51232131 is a deficient number, since it is larger than the sum of its proper divisors (23983789).

51232131 is a wasteful number, since it uses less digits than its factorization.

51232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93386 (or 93383 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 51232131 is about 7157.6623977385. The cubic root of 51232131 is about 371.4047669515.

Adding to 51232131 its reverse (13123215), we get a palindrome (64355346).

The spelling of 51232131 in words is "fifty-one million, two hundred thirty-two thousand, one hundred thirty-one".