51918656 has 28 divisors (see below), whose sum is σ = 103266240. Its totient is φ = 25898880.

The previous prime is 51918653. The next prime is 51918661. The reversal of 51918656 is 65681915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51918653) 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, 41561 + ... + 42791.

It is an arithmetic number, because the mean of its divisors is an integer number (3688080).

Almost surely, 2^51918656 is an apocalyptic number.

It is an amenable number.

51918656 is a deficient number, since it is larger than the sum of its proper divisors (51347584).

51918656 is a wasteful number, since it uses less digits than its factorization.

51918656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 1892 counting only the distinct ones).

The product of its digits is 64800, while the sum is 41.

The square root of 51918656 is about 7205.4601518571. The cubic root of 51918656 is about 373.0563875777.

The spelling of 51918656 in words is "fifty-one million, nine hundred eighteen thousand, six hundred fifty-six".