56906513 has 4 divisors (see below), whose sum is σ = 57078768. Its totient is φ = 56734260.

The previous prime is 56906491. The next prime is 56906557. The reversal of 56906513 is 31560965.

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 not a de Polignac number, because 56906513 - 2⁸ = 56906257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56906593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85631 + ... + 86292.

It is an arithmetic number, because the mean of its divisors is an integer number (14269692).

Almost surely, 2^56906513 is an apocalyptic number.

It is an amenable number.

56906513 is a deficient number, since it is larger than the sum of its proper divisors (172255).

56906513 is a wasteful number, since it uses less digits than its factorization.

56906513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172254.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 56906513 is about 7543.6405667290. The cubic root of 56906513 is about 384.6395975126.

The spelling of 56906513 in words is "fifty-six million, nine hundred six thousand, five hundred thirteen".