56620211 has 2 divisors, whose sum is σ = 56620212. Its totient is φ = 56620210.

The previous prime is 56620177. The next prime is 56620219. The reversal of 56620211 is 11202665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56620211 - 2¹⁰ = 56619187 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56620219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310105 + 28310106.

It is an arithmetic number, because the mean of its divisors is an integer number (28310106).

Almost surely, 2^56620211 is an apocalyptic number.

56620211 is a deficient number, since it is larger than the sum of its proper divisors (1).

56620211 is an equidigital number, since it uses as much as digits as its factorization.

56620211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 56620211 is about 7524.6402571817. The cubic root of 56620211 is about 383.9934600847.

Adding to 56620211 its reverse (11202665), we get a palindrome (67822876).

The spelling of 56620211 in words is "fifty-six million, six hundred twenty thousand, two hundred eleven".