56571149 has 2 divisors, whose sum is σ = 56571150. Its totient is φ = 56571148.

The previous prime is 56571143. The next prime is 56571157. The reversal of 56571149 is 94117565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 1737124 = 7405^2 + 1318^2 .

It is a cyclic number.

It is not a de Polignac number, because 56571149 - 2⁸ = 56570893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56571143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28285574 + 28285575.

It is an arithmetic number, because the mean of its divisors is an integer number (28285575).

Almost surely, 2^56571149 is an apocalyptic number.

It is an amenable number.

56571149 is a deficient number, since it is larger than the sum of its proper divisors (1).

56571149 is an equidigital number, since it uses as much as digits as its factorization.

56571149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 38.

The square root of 56571149 is about 7521.3794612425. The cubic root of 56571149 is about 383.8825165955.

The spelling of 56571149 in words is "fifty-six million, five hundred seventy-one thousand, one hundred forty-nine".