56132491 has 2 divisors, whose sum is σ = 56132492. Its totient is φ = 56132490.

The previous prime is 56132471. The next prime is 56132507. The reversal of 56132491 is 19423165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56132491 is a prime.

It is not a weakly prime, because it can be changed into another prime (56132471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28066245 + 28066246.

It is an arithmetic number, because the mean of its divisors is an integer number (28066246).

Almost surely, 2^56132491 is an apocalyptic number.

56132491 is a deficient number, since it is larger than the sum of its proper divisors (1).

56132491 is an equidigital number, since it uses as much as digits as its factorization.

56132491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 56132491 is about 7492.1619710201. The cubic root of 56132491 is about 382.8877205433.

The spelling of 56132491 in words is "fifty-six million, one hundred thirty-two thousand, four hundred ninety-one".