56181539 has 2 divisors, whose sum is σ = 56181540. Its totient is φ = 56181538.

The previous prime is 56181533. The next prime is 56181547. The reversal of 56181539 is 93518165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56181539 - 2⁴ = 56181523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56181533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28090769 + 28090770.

It is an arithmetic number, because the mean of its divisors is an integer number (28090770).

Almost surely, 2^56181539 is an apocalyptic number.

56181539 is a deficient number, since it is larger than the sum of its proper divisors (1).

56181539 is an equidigital number, since it uses as much as digits as its factorization.

56181539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 56181539 is about 7495.4345437740. The cubic root of 56181539 is about 382.9992092097. Note that the first 3 decimals are identical.

The spelling of 56181539 in words is "fifty-six million, one hundred eighty-one thousand, five hundred thirty-nine".