64564215 has 32 divisors (see below), whose sum is σ = 111041280. Its totient is φ = 31916544.

The previous prime is 64564163. The next prime is 64564219. The reversal of 64564215 is 51246546.

It is not a de Polignac number, because 64564215 - 2⁸ = 64563959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64564219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15196 + ... + 18974.

It is an arithmetic number, because the mean of its divisors is an integer number (3470040).

Almost surely, 2^64564215 is an apocalyptic number.

64564215 is a deficient number, since it is larger than the sum of its proper divisors (46477065).

64564215 is a wasteful number, since it uses less digits than its factorization.

64564215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871.

The product of its digits is 28800, while the sum is 33.

The square root of 64564215 is about 8035.1860588290. The cubic root of 64564215 is about 401.1720105410.

The spelling of 64564215 in words is "sixty-four million, five hundred sixty-four thousand, two hundred fifteen".