22142279 has 8 divisors (see below), whose sum is σ = 23493888. Its totient is φ = 20796160.

The previous prime is 22142257. The next prime is 22142293. The reversal of 22142279 is 97224122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22142279 - 2⁸ = 22142023 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 (22142299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9434 + ... + 11544.

It is an arithmetic number, because the mean of its divisors is an integer number (2936736).

Almost surely, 2^22142279 is an apocalyptic number.

22142279 is a deficient number, since it is larger than the sum of its proper divisors (1351609).

22142279 is a wasteful number, since it uses less digits than its factorization.

22142279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745.

The product of its digits is 4032, while the sum is 29.

The square root of 22142279 is about 4705.5583090639. The cubic root of 22142279 is about 280.8066830592.

The spelling of 22142279 in words is "twenty-two million, one hundred forty-two thousand, two hundred seventy-nine".