56089021 has 2 divisors, whose sum is σ = 56089022. Its totient is φ = 56089020.

The previous prime is 56089009. The next prime is 56089051. The reversal of 56089021 is 12098065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55666521 + 422500 = 7461^2 + 650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56089021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56089051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28044510 + 28044511.

It is an arithmetic number, because the mean of its divisors is an integer number (28044511).

Almost surely, 2^56089021 is an apocalyptic number.

It is an amenable number.

56089021 is a deficient number, since it is larger than the sum of its proper divisors (1).

56089021 is an equidigital number, since it uses as much as digits as its factorization.

56089021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 56089021 is about 7489.2603773670. The cubic root of 56089021 is about 382.7888566633.

The spelling of 56089021 in words is "fifty-six million, eighty-nine thousand, twenty-one".