56574209 has 2 divisors, whose sum is σ = 56574210. Its totient is φ = 56574208.

The previous prime is 56574187. The next prime is 56574223. The reversal of 56574209 is 90247565.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 11751184 = 6695^2 + 3428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56574209 is a prime.

It is a super-2 number, since 2×56574209² = 6401282247951362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56574239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28287104 + 28287105.

It is an arithmetic number, because the mean of its divisors is an integer number (28287105).

Almost surely, 2^56574209 is an apocalyptic number.

It is an amenable number.

56574209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56574209 is an equidigital number, since it uses as much as digits as its factorization.

56574209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 56574209 is about 7521.5828786234. The cubic root of 56574209 is about 383.8894380230.

The spelling of 56574209 in words is "fifty-six million, five hundred seventy-four thousand, two hundred nine".