51766331 has 4 divisors (see below), whose sum is σ = 51788472. Its totient is φ = 51744192.

The previous prime is 51766327. The next prime is 51766339. The reversal of 51766331 is 13366715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13366715 = 5 ⋅2673343.

It is a cyclic number.

It is not a de Polignac number, because 51766331 - 2² = 51766327 is a prime.

It is a super-2 number, since 2×51766331² = 5359506050403122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51766339) 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, 7085 + ... + 12398.

It is an arithmetic number, because the mean of its divisors is an integer number (12947118).

Almost surely, 2^51766331 is an apocalyptic number.

51766331 is a deficient number, since it is larger than the sum of its proper divisors (22141).

51766331 is a wasteful number, since it uses less digits than its factorization.

51766331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22140.

The product of its digits is 11340, while the sum is 32.

The square root of 51766331 is about 7194.8822783976. The cubic root of 51766331 is about 372.6911914328.

The spelling of 51766331 in words is "fifty-one million, seven hundred sixty-six thousand, three hundred thirty-one".