56564209 has 8 divisors (see below), whose sum is σ = 61774272. Its totient is φ = 51476880.

The previous prime is 56564203. The next prime is 56564213. The reversal of 56564209 is 90246565.

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

It is not a de Polignac number, because 56564209 - 2⁵ = 56564177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56564203) 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, 29719 + ... + 31564.

It is an arithmetic number, because the mean of its divisors is an integer number (7721784).

Almost surely, 2^56564209 is an apocalyptic number.

It is an amenable number.

56564209 is a deficient number, since it is larger than the sum of its proper divisors (5210063).

56564209 is a wasteful number, since it uses less digits than its factorization.

56564209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61367.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 56564209 is about 7520.9180955519. The cubic root of 56564209 is about 383.8668180538.

The spelling of 56564209 in words is "fifty-six million, five hundred sixty-four thousand, two hundred nine".