22147439 has 4 divisors (see below), whose sum is σ = 22203624. Its totient is φ = 22091256.

The previous prime is 22147429. The next prime is 22147441. The reversal of 22147439 is 93474122.

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 22147439 - 2¹² = 22143343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147409) 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, 27497 + ... + 28290.

It is an arithmetic number, because the mean of its divisors is an integer number (5550906).

Almost surely, 2^22147439 is an apocalyptic number.

22147439 is a deficient number, since it is larger than the sum of its proper divisors (56185).

22147439 is an equidigital number, since it uses as much as digits as its factorization.

22147439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56184.

The product of its digits is 12096, while the sum is 32.

The square root of 22147439 is about 4706.1065648793. The cubic root of 22147439 is about 280.8284942730.

The spelling of 22147439 in words is "twenty-two million, one hundred forty-seven thousand, four hundred thirty-nine".