51716731 has 12 divisors (see below), whose sum is σ = 57087856. Its totient is φ = 46815120.

The previous prime is 51716723. The next prime is 51716741. The reversal of 51716731 is 13761715.

51716731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51716731 - 2³ = 51716723 is a prime.

It is a super-2 number, since 2×51716731² = 5349240530652722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51716693 and 51716702.

It is not an unprimeable number, because it can be changed into a prime (51716741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32746 + ... + 34288.

Almost surely, 2^51716731 is an apocalyptic number.

51716731 is a deficient number, since it is larger than the sum of its proper divisors (5371125).

51716731 is a wasteful number, since it uses less digits than its factorization.

51716731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1831 counting only the distinct ones).

The product of its digits is 4410, while the sum is 31.

The square root of 51716731 is about 7191.4345578612. The cubic root of 51716731 is about 372.5721218249.

The spelling of 51716731 in words is "fifty-one million, seven hundred sixteen thousand, seven hundred thirty-one".