51646916 has 24 divisors (see below), whose sum is σ = 92767584. Its totient is φ = 25151040.

The previous prime is 51646897. The next prime is 51646939. The reversal of 51646916 is 61964615.

It is a super-2 number, since 2×51646916² = 5334807864622112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51646916.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23171 + ... + 25301.

It is an arithmetic number, because the mean of its divisors is an integer number (3865316).

Almost surely, 2^51646916 is an apocalyptic number.

It is an amenable number.

51646916 is a deficient number, since it is larger than the sum of its proper divisors (41120668).

51646916 is a wasteful number, since it uses less digits than its factorization.

51646916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2289 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 51646916 is about 7186.5788801070. The cubic root of 51646916 is about 372.4043950851.

The spelling of 51646916 in words is "fifty-one million, six hundred forty-six thousand, nine hundred sixteen".