56213711 has 4 divisors (see below), whose sum is σ = 56364792. Its totient is φ = 56062632.

The previous prime is 56213701. The next prime is 56213749. The reversal of 56213711 is 11731265.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56213711 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 (56213701) 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, 74981 + ... + 75726.

It is an arithmetic number, because the mean of its divisors is an integer number (14091198).

Almost surely, 2^56213711 is an apocalyptic number.

56213711 is a deficient number, since it is larger than the sum of its proper divisors (151081).

56213711 is a wasteful number, since it uses less digits than its factorization.

56213711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151080.

The product of its digits is 1260, while the sum is 26.

The square root of 56213711 is about 7497.5803430173. The cubic root of 56213711 is about 383.0723026108.

Adding to 56213711 its reverse (11731265), we get a palindrome (67944976).

The spelling of 56213711 in words is "fifty-six million, two hundred thirteen thousand, seven hundred eleven".