64475215 has 16 divisors (see below), whose sum is σ = 88561728. Its totient is φ = 44142336.

The previous prime is 64475209. The next prime is 64475251. The reversal of 64475215 is 51257446.

It is not a de Polignac number, because 64475215 - 2⁷ = 64475087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32389 + ... + 34321.

It is an arithmetic number, because the mean of its divisors is an integer number (5535108).

Almost surely, 2^64475215 is an apocalyptic number.

64475215 is a deficient number, since it is larger than the sum of its proper divisors (24086513).

64475215 is a wasteful number, since it uses less digits than its factorization.

64475215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898.

The product of its digits is 33600, while the sum is 34.

The square root of 64475215 is about 8029.6460071413. The cubic root of 64475215 is about 400.9875909038.

The spelling of 64475215 in words is "sixty-four million, four hundred seventy-five thousand, two hundred fifteen".