56511717 has 4 divisors (see below), whose sum is σ = 75348960. Its totient is φ = 37674476.

The previous prime is 56511703. The next prime is 56511731. The reversal of 56511717 is 71711565.

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 an interprime number because it is at equal distance from previous prime (56511703) and next prime (56511731).

It is a cyclic number.

It is not a de Polignac number, because 56511717 - 2²³ = 48123109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56511737) 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, 9418617 + ... + 9418622.

It is an arithmetic number, because the mean of its divisors is an integer number (18837240).

Almost surely, 2^56511717 is an apocalyptic number.

It is an amenable number.

56511717 is a deficient number, since it is larger than the sum of its proper divisors (18837243).

56511717 is a wasteful number, since it uses less digits than its factorization.

56511717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18837242.

The product of its digits is 7350, while the sum is 33.

The square root of 56511717 is about 7517.4275520287. The cubic root of 56511717 is about 383.7480375642.

The spelling of 56511717 in words is "fifty-six million, five hundred eleven thousand, seven hundred seventeen".