56622491 has 2 divisors, whose sum is σ = 56622492. Its totient is φ = 56622490.

The previous prime is 56622487. The next prime is 56622493. The reversal of 56622491 is 19422665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56622491 - 2² = 56622487 is a prime.

It is a super-2 number, since 2×56622491² = 6412212974090162, which contains 22 as substring.

Together with 56622493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56622493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28311245 + 28311246.

It is an arithmetic number, because the mean of its divisors is an integer number (28311246).

Almost surely, 2^56622491 is an apocalyptic number.

56622491 is a deficient number, since it is larger than the sum of its proper divisors (1).

56622491 is an equidigital number, since it uses as much as digits as its factorization.

56622491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 56622491 is about 7524.7917579160. The cubic root of 56622491 is about 383.9986142709.

The spelling of 56622491 in words is "fifty-six million, six hundred twenty-two thousand, four hundred ninety-one".