56133491 has 2 divisors, whose sum is σ = 56133492. Its totient is φ = 56133490.

The previous prime is 56133461. The next prime is 56133499. The reversal of 56133491 is 19433165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56133491 - 2²² = 51939187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56133499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28066745 + 28066746.

It is an arithmetic number, because the mean of its divisors is an integer number (28066746).

Almost surely, 2^56133491 is an apocalyptic number.

56133491 is a deficient number, since it is larger than the sum of its proper divisors (1).

56133491 is an equidigital number, since it uses as much as digits as its factorization.

56133491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 56133491 is about 7492.2287071338. The cubic root of 56133491 is about 382.8899942440.

The spelling of 56133491 in words is "fifty-six million, one hundred thirty-three thousand, four hundred ninety-one".