56621447 has 2 divisors, whose sum is σ = 56621448. Its totient is φ = 56621446.

The previous prime is 56621443. The next prime is 56621471. The reversal of 56621447 is 74412665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56621447 - 2² = 56621443 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56621443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310723 + 28310724.

It is an arithmetic number, because the mean of its divisors is an integer number (28310724).

Almost surely, 2^56621447 is an apocalyptic number.

56621447 is a deficient number, since it is larger than the sum of its proper divisors (1).

56621447 is an equidigital number, since it uses as much as digits as its factorization.

56621447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 56621447 is about 7524.7223869057. The cubic root of 56621447 is about 383.9962542133.

The spelling of 56621447 in words is "fifty-six million, six hundred twenty-one thousand, four hundred forty-seven".