51712831 has 4 divisors (see below), whose sum is σ = 52813152. Its totient is φ = 50612512.

The previous prime is 51712799. The next prime is 51712877. The reversal of 51712831 is 13821715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51712831 - 2⁵ = 51712799 is a prime.

It is a super-2 number, since 2×51712831² = 5348433780069122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51712831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51712231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550090 + ... + 550183.

It is an arithmetic number, because the mean of its divisors is an integer number (13203288).

Almost surely, 2^51712831 is an apocalyptic number.

51712831 is a deficient number, since it is larger than the sum of its proper divisors (1100321).

51712831 is a wasteful number, since it uses less digits than its factorization.

51712831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100320.

The product of its digits is 1680, while the sum is 28.

The square root of 51712831 is about 7191.1633968364. The cubic root of 51712831 is about 372.5627562690.

The spelling of 51712831 in words is "fifty-one million, seven hundred twelve thousand, eight hundred thirty-one".