56609261 has 4 divisors (see below), whose sum is σ = 57568800. Its totient is φ = 55649724.

The previous prime is 56609249. The next prime is 56609263. The reversal of 56609261 is 16290665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56609261 is a prime.

It is a super-2 number, since 2×56609261² = 6409216861932242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56609263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479681 + ... + 479798.

It is an arithmetic number, because the mean of its divisors is an integer number (14392200).

Almost surely, 2^56609261 is an apocalyptic number.

It is an amenable number.

56609261 is a deficient number, since it is larger than the sum of its proper divisors (959539).

56609261 is an equidigital number, since it uses as much as digits as its factorization.

56609261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959538.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 56609261 is about 7523.9126124643. The cubic root of 56609261 is about 383.9687044989.

The spelling of 56609261 in words is "fifty-six million, six hundred nine thousand, two hundred sixty-one".