56575309 has 8 divisors (see below), whose sum is σ = 64703360. Its totient is φ = 48458736.

The previous prime is 56575289. The next prime is 56575313. The reversal of 56575309 is 90357565.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56575309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56575339) 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, 15907 + ... + 19135.

It is an arithmetic number, because the mean of its divisors is an integer number (8087920).

Almost surely, 2^56575309 is an apocalyptic number.

It is an amenable number.

56575309 is a deficient number, since it is larger than the sum of its proper divisors (8128051).

56575309 is a wasteful number, since it uses less digits than its factorization.

56575309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739.

The product of its (nonzero) digits is 141750, while the sum is 40.

The square root of 56575309 is about 7521.6560011742. The cubic root of 56575309 is about 383.8919260569.

The spelling of 56575309 in words is "fifty-six million, five hundred seventy-five thousand, three hundred nine".