51766731 has 6 divisors (see below), whose sum is σ = 74774180. Its totient is φ = 34511148.

The previous prime is 51766727. The next prime is 51766733. The reversal of 51766731 is 13766715.

It is not a de Polignac number, because 51766731 - 2² = 51766727 is a prime.

It is a super-2 number, since 2×51766731² = 5359588876852722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51766733) 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, 2875921 + ... + 2875938.

Almost surely, 2^51766731 is an apocalyptic number.

51766731 is a deficient number, since it is larger than the sum of its proper divisors (23007449).

51766731 is a wasteful number, since it uses less digits than its factorization.

51766731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751865 (or 5751862 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 51766731 is about 7194.9100758800. The cubic root of 51766731 is about 372.6921513623.

The spelling of 51766731 in words is "fifty-one million, seven hundred sixty-six thousand, seven hundred thirty-one".