56122213 has 4 divisors (see below), whose sum is σ = 64139680. Its totient is φ = 48104748.

The previous prime is 56122211. The next prime is 56122217. The reversal of 56122213 is 31222165.

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 56122213 - 2¹ = 56122211 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 (56122211) 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, 4008723 + ... + 4008736.

It is an arithmetic number, because the mean of its divisors is an integer number (16034920).

Almost surely, 2^56122213 is an apocalyptic number.

It is an amenable number.

56122213 is a deficient number, since it is larger than the sum of its proper divisors (8017467).

56122213 is an equidigital number, since it uses as much as digits as its factorization.

56122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8017466.

The product of its digits is 720, while the sum is 22.

The square root of 56122213 is about 7491.4760227875. The cubic root of 56122213 is about 382.8643498826.

Adding to 56122213 its reverse (31222165), we get a palindrome (87344378).

The spelling of 56122213 in words is "fifty-six million, one hundred twenty-two thousand, two hundred thirteen".