56043209 has 2 divisors, whose sum is σ = 56043210. Its totient is φ = 56043208.

The previous prime is 56043193. The next prime is 56043259. The reversal of 56043209 is 90234065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 27793984 = 5315^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 56043209 - 2⁴ = 56043193 is a prime.

It is not a weakly prime, because it can be changed into another prime (56043259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28021604 + 28021605.

It is an arithmetic number, because the mean of its divisors is an integer number (28021605).

Almost surely, 2^56043209 is an apocalyptic number.

It is an amenable number.

56043209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56043209 is an equidigital number, since it uses as much as digits as its factorization.

56043209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56043209 is about 7486.2012396141. The cubic root of 56043209 is about 382.6846110709.

The spelling of 56043209 in words is "fifty-six million, forty-three thousand, two hundred nine".