56058991 has 2 divisors, whose sum is σ = 56058992. Its totient is φ = 56058990.

The previous prime is 56058929. The next prime is 56059039. The reversal of 56058991 is 19985065.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56058991 - 2¹¹ = 56056943 is a prime.

It is a super-2 number, since 2×56058991² = 6285220943876162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56058391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28029495 + 28029496.

It is an arithmetic number, because the mean of its divisors is an integer number (28029496).

Almost surely, 2^56058991 is an apocalyptic number.

56058991 is a deficient number, since it is larger than the sum of its proper divisors (1).

56058991 is an equidigital number, since it uses as much as digits as its factorization.

56058991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 56058991 is about 7487.2552380696. The cubic root of 56058991 is about 382.7205295572.

The spelling of 56058991 in words is "fifty-six million, fifty-eight thousand, nine hundred ninety-one".