56508517 has 4 divisors (see below), whose sum is σ = 60855340. Its totient is φ = 52161696.

The previous prime is 56508511. The next prime is 56508533. The reversal of 56508517 is 71580565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21473956 + 35034561 = 4634^2 + 5919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56508517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56508511) 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, 2173392 + ... + 2173417.

It is an arithmetic number, because the mean of its divisors is an integer number (15213835).

Almost surely, 2^56508517 is an apocalyptic number.

It is an amenable number.

56508517 is a deficient number, since it is larger than the sum of its proper divisors (4346823).

56508517 is a wasteful number, since it uses less digits than its factorization.

56508517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346822.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 56508517 is about 7517.2147102501. The cubic root of 56508517 is about 383.7407941289.

The spelling of 56508517 in words is "fifty-six million, five hundred eight thousand, five hundred seventeen".