51192831 has 16 divisors (see below), whose sum is σ = 72943200. Its totient is φ = 31822848.

The previous prime is 51192829. The next prime is 51192851. The reversal of 51192831 is 13829115.

It is not a de Polignac number, because 51192831 - 2¹ = 51192829 is a prime.

It is a super-2 number, since 2×51192831² = 5241411891589122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51192851) 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, 955 + ... + 10163.

It is an arithmetic number, because the mean of its divisors is an integer number (4558950).

Almost surely, 2^51192831 is an apocalyptic number.

51192831 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51192831 is a deficient number, since it is larger than the sum of its proper divisors (21750369).

51192831 is a wasteful number, since it uses less digits than its factorization.

51192831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338.

The product of its digits is 2160, while the sum is 30.

The square root of 51192831 is about 7154.9165613584. The cubic root of 51192831 is about 371.3097748643.

The spelling of 51192831 in words is "fifty-one million, one hundred ninety-two thousand, eight hundred thirty-one".