56541209 has 2 divisors, whose sum is σ = 56541210. Its totient is φ = 56541208.

The previous prime is 56541197. The next prime is 56541227. The reversal of 56541209 is 90214565.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50013184 + 6528025 = 7072^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 56541209 - 2⁴ = 56541193 is a prime.

It is a Chen prime.

It is equal to p_3368633 and since 56541209 and 3368633 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56541239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270604 + 28270605.

It is an arithmetic number, because the mean of its divisors is an integer number (28270605).

Almost surely, 2^56541209 is an apocalyptic number.

It is an amenable number.

56541209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56541209 is an equidigital number, since it uses as much as digits as its factorization.

56541209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 56541209 is about 7519.3888714443. The cubic root of 56541209 is about 383.8147820054.

The spelling of 56541209 in words is "fifty-six million, five hundred forty-one thousand, two hundred nine".