56656213 has 8 divisors (see below), whose sum is σ = 58617432. Its totient is φ = 54717696.

The previous prime is 56656211. The next prime is 56656217. The reversal of 56656213 is 31265665.

It can be written as a sum of positive squares in 4 ways, for example, as 33443089 + 23213124 = 5783^2 + 4818^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56656213 - 2¹ = 56656211 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 (56656211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520 + ... + 10657.

It is an arithmetic number, because the mean of its divisors is an integer number (7327179).

Almost surely, 2^56656213 is an apocalyptic number.

It is an amenable number.

56656213 is a deficient number, since it is larger than the sum of its proper divisors (1961219).

56656213 is a wasteful number, since it uses less digits than its factorization.

56656213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11351.

The product of its digits is 32400, while the sum is 34.

The square root of 56656213 is about 7527.0321508547. The cubic root of 56656213 is about 384.0748303423.

The spelling of 56656213 in words is "fifty-six million, six hundred fifty-six thousand, two hundred thirteen".