56427209 has 4 divisors (see below), whose sum is σ = 56484804. Its totient is φ = 56369616.

The previous prime is 56427197. The next prime is 56427247. The reversal of 56427209 is 90272465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32171584 + 24255625 = 5672^2 + 4925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56427209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56424209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27302 + ... + 29295.

It is an arithmetic number, because the mean of its divisors is an integer number (14121201).

Almost surely, 2^56427209 is an apocalyptic number.

It is an amenable number.

56427209 is a deficient number, since it is larger than the sum of its proper divisors (57595).

56427209 is an equidigital number, since it uses as much as digits as its factorization.

56427209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57594.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 56427209 is about 7511.8046433597. The cubic root of 56427209 is about 383.5566556729.

The spelling of 56427209 in words is "fifty-six million, four hundred twenty-seven thousand, two hundred nine".