51162831 has 6 divisors (see below), whose sum is σ = 73901880. Its totient is φ = 34108548.

The previous prime is 51162821. The next prime is 51162841. The reversal of 51162831 is 13826115.

51162831 is a `hidden beast` number, since 5 + 1 + 1 + 628 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (51162821) and next prime (51162841).

It is not a de Polignac number, because 51162831 - 2¹⁰ = 51161807 is a prime.

It is a super-2 number, since 2×51162831² = 5235270551869122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51162795 and 51162804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51162821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2842371 + ... + 2842388.

It is an arithmetic number, because the mean of its divisors is an integer number (12316980).

Almost surely, 2^51162831 is an apocalyptic number.

51162831 is a deficient number, since it is larger than the sum of its proper divisors (22739049).

51162831 is a wasteful number, since it uses less digits than its factorization.

51162831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684765 (or 5684762 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 51162831 is about 7152.8197936199. The cubic root of 51162831 is about 371.2372290951.

Adding to 51162831 its reverse (13826115), we get a palindrome (64988946).

The spelling of 51162831 in words is "fifty-one million, one hundred sixty-two thousand, eight hundred thirty-one".