51185216 has 28 divisors (see below), whose sum is σ = 104851200. Its totient is φ = 24766080.

The previous prime is 51185177. The next prime is 51185231. The reversal of 51185216 is 61258115.

It is a congruent number.

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, 10916 + ... + 14883.

Almost surely, 2^51185216 is an apocalyptic number.

It is an amenable number.

51185216 is an abundant number, since it is smaller than the sum of its proper divisors (53665984).

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

51185216 is a wasteful number, since it uses less digits than its factorization.

51185216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25842 (or 25832 counting only the distinct ones).

The product of its digits is 2400, while the sum is 29.

The square root of 51185216 is about 7154.3843900087. The cubic root of 51185216 is about 371.2913630145.

The spelling of 51185216 in words is "fifty-one million, one hundred eighty-five thousand, two hundred sixteen".