51065604 has 36 divisors (see below), whose sum is σ = 130235196. Its totient is φ = 16869888.

The previous prime is 51065593. The next prime is 51065611. The reversal of 51065604 is 40656015.

It is a happy number.

51065604 is a `hidden beast` number, since 5 + 1 + 0 + 656 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27562500 + 23503104 = 5250^2 + 4848^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2209 + ... + 10344.

Almost surely, 2^51065604 is an apocalyptic number.

It is an amenable number.

51065604 is an abundant number, since it is smaller than the sum of its proper divisors (79169592).

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

51065604 is a wasteful number, since it uses less digits than its factorization.

51065604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12676 (or 12671 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51065604 is about 7146.0201511051. The cubic root of 51065604 is about 371.0019204450.

The spelling of 51065604 in words is "fifty-one million, sixty-five thousand, six hundred four".