56621941 has 2 divisors, whose sum is σ = 56621942. Its totient is φ = 56621940.

The previous prime is 56621911. The next prime is 56621947. The reversal of 56621941 is 14912665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 221841 = 7510^2 + 471^2 .

It is a cyclic number.

It is not a de Polignac number, because 56621941 - 2⁵ = 56621909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56621897 and 56621906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56621947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310970 + 28310971.

It is an arithmetic number, because the mean of its divisors is an integer number (28310971).

Almost surely, 2^56621941 is an apocalyptic number.

It is an amenable number.

56621941 is a deficient number, since it is larger than the sum of its proper divisors (1).

56621941 is an equidigital number, since it uses as much as digits as its factorization.

56621941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 56621941 is about 7524.7552119654. The cubic root of 56621941 is about 383.9973709492.

The spelling of 56621941 in words is "fifty-six million, six hundred twenty-one thousand, nine hundred forty-one".