51365331 has 6 divisors (see below), whose sum is σ = 74194380. Its totient is φ = 34243548.

The previous prime is 51365311. The next prime is 51365389. The reversal of 51365331 is 13356315.

51365331 is a `hidden beast` number, since 5 + 1 + 3 + 653 + 3 + 1 = 666.

It is not a de Polignac number, because 51365331 - 2⁵ = 51365299 is a prime.

It is a super-2 number, since 2×51365331² = 5276794457479122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51365295 and 51365304.

It is not an unprimeable number, because it can be changed into a prime (51365311) 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, 2853621 + ... + 2853638.

It is an arithmetic number, because the mean of its divisors is an integer number (12365730).

Almost surely, 2^51365331 is an apocalyptic number.

51365331 is a deficient number, since it is larger than the sum of its proper divisors (22829049).

51365331 is a wasteful number, since it uses less digits than its factorization.

51365331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707265 (or 5707262 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 51365331 is about 7166.9610714723. The cubic root of 51365331 is about 371.7263639778.

The spelling of 51365331 in words is "fifty-one million, three hundred sixty-five thousand, three hundred thirty-one".