51665264 has 20 divisors (see below), whose sum is σ = 114401904. Its totient is φ = 22142208.

The previous prime is 51665219. The next prime is 51665279. The reversal of 51665264 is 46256615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230537 + ... + 230760.

Almost surely, 2^51665264 is an apocalyptic number.

It is an amenable number.

51665264 is an abundant number, since it is smaller than the sum of its proper divisors (62736640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51665264 is a wasteful number, since it uses less digits than its factorization.

51665264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461312 (or 461306 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 51665264 is about 7187.8553129567. The cubic root of 51665264 is about 372.4484897919.

The spelling of 51665264 in words is "fifty-one million, six hundred sixty-five thousand, two hundred sixty-four".