56611223 has 2 divisors, whose sum is σ = 56611224. Its totient is φ = 56611222.

The previous prime is 56611199. The next prime is 56611231. The reversal of 56611223 is 32211665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56611223 - 2²⁴ = 39834007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56611192 and 56611201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56611253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28305611 + 28305612.

It is an arithmetic number, because the mean of its divisors is an integer number (28305612).

Almost surely, 2^56611223 is an apocalyptic number.

56611223 is a deficient number, since it is larger than the sum of its proper divisors (1).

56611223 is an equidigital number, since it uses as much as digits as its factorization.

56611223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 56611223 is about 7524.0429956241. The cubic root of 56611223 is about 383.9731403920.

Adding to 56611223 its reverse (32211665), we get a palindrome (88822888).

The spelling of 56611223 in words is "fifty-six million, six hundred eleven thousand, two hundred twenty-three".