64564131 has 8 divisors (see below), whose sum is σ = 86138640. Its totient is φ = 43016192.

The previous prime is 64564111. The next prime is 64564163. The reversal of 64564131 is 13146546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64564131 - 2⁵ = 64564099 is a prime.

It is a super-2 number, since 2×64564131² = 8337054023570322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64564111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30 + ... + 11363.

It is an arithmetic number, because the mean of its divisors is an integer number (10767330).

Almost surely, 2^64564131 is an apocalyptic number.

64564131 is a deficient number, since it is larger than the sum of its proper divisors (21574509).

64564131 is a wasteful number, since it uses less digits than its factorization.

64564131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285.

The product of its digits is 8640, while the sum is 30.

The square root of 64564131 is about 8035.1808318170. The cubic root of 64564131 is about 401.1718365619.

The spelling of 64564131 in words is "sixty-four million, five hundred sixty-four thousand, one hundred thirty-one".