51900831 has 20 divisors (see below), whose sum is σ = 79186272. Its totient is φ = 33861888.

The previous prime is 51900817. The next prime is 51900841. The reversal of 51900831 is 13800915.

It is not a de Polignac number, because 51900831 - 2⁶ = 51900767 is a prime.

It is a super-2 number, since 2×51900831² = 5387392516981122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51900795 and 51900804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3010 + ... + 10623.

Almost surely, 2^51900831 is an apocalyptic number.

51900831 is a deficient number, since it is larger than the sum of its proper divisors (27285441).

51900831 is a wasteful number, since it uses less digits than its factorization.

51900831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13692 (or 13683 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 51900831 is about 7204.2231364666. The cubic root of 51900831 is about 373.0136894304.

The spelling of 51900831 in words is "fifty-one million, nine hundred thousand, eight hundred thirty-one".