215725065 has 32 divisors (see below), whose sum is σ = 354931200. Its totient is φ = 111830784.

The previous prime is 215725049. The next prime is 215725079. The reversal of 215725065 is 560527512.

215725065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215725065 - 2⁴ = 215725049 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, 109711 + ... + 111659.

It is an arithmetic number, because the mean of its divisors is an integer number (11091600).

Almost surely, 2^215725065 is an apocalyptic number.

It is an amenable number.

215725065 is a deficient number, since it is larger than the sum of its proper divisors (139206135).

215725065 is a wasteful number, since it uses less digits than its factorization.

215725065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 215725065 is about 14687.5819997711. The cubic root of 215725065 is about 599.7453224698.

The spelling of 215725065 in words is "two hundred fifteen million, seven hundred twenty-five thousand, sixty-five".