51600865 has 32 divisors (see below), whose sum is σ = 69984000. Its totient is φ = 36292608.

The previous prime is 51600859. The next prime is 51600881. The reversal of 51600865 is 56800615.

It is a cyclic number.

It is not a de Polignac number, because 51600865 - 2⁷ = 51600737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143556 + ... + 143914.

It is an arithmetic number, because the mean of its divisors is an integer number (2187000).

Almost surely, 2^51600865 is an apocalyptic number.

It is an amenable number.

51600865 is a deficient number, since it is larger than the sum of its proper divisors (18383135).

51600865 is a wasteful number, since it uses less digits than its factorization.

51600865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 51600865 is about 7183.3742071536. The cubic root of 51600865 is about 372.2936773127.

The spelling of 51600865 in words is "fifty-one million, six hundred thousand, eight hundred sixty-five".