51905164 has 12 divisors (see below), whose sum is σ = 91173600. Its totient is φ = 25855568.

The previous prime is 51905153. The next prime is 51905201. The reversal of 51905164 is 46150915.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23044 + ... + 25195.

It is an arithmetic number, because the mean of its divisors is an integer number (7597800).

Almost surely, 2^51905164 is an apocalyptic number.

It is an amenable number.

51905164 is a deficient number, since it is larger than the sum of its proper divisors (39268436).

51905164 is a wasteful number, since it uses less digits than its factorization.

51905164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48512 (or 48510 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 51905164 is about 7204.5238565779. The cubic root of 51905164 is about 373.0240696325.

The spelling of 51905164 in words is "fifty-one million, nine hundred five thousand, one hundred sixty-four".