22056439 has 4 divisors (see below), whose sum is σ = 22358656. Its totient is φ = 21754224.

The previous prime is 22056413. The next prime is 22056449. The reversal of 22056439 is 93465022.

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

It is a cyclic number.

It is not a de Polignac number, because 22056439 - 2⁷ = 22056311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22056439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056409) 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, 150999 + ... + 151144.

It is an arithmetic number, because the mean of its divisors is an integer number (5589664).

Almost surely, 2^22056439 is an apocalyptic number.

22056439 is a deficient number, since it is larger than the sum of its proper divisors (302217).

22056439 is an equidigital number, since it uses as much as digits as its factorization.

22056439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302216.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 22056439 is about 4696.4283237371. The cubic root of 22056439 is about 280.4433410280.

The spelling of 22056439 in words is "twenty-two million, fifty-six thousand, four hundred thirty-nine".