22279429 has 4 divisors (see below), whose sum is σ = 22306284. Its totient is φ = 22252576.

The previous prime is 22279423. The next prime is 22279447. The reversal of 22279429 is 92497222.

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 11716929 + 10562500 = 3423^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 22279429 - 2¹⁹ = 21755141 is a prime.

It is a super-4 number, since 4×22279429⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22279423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12142 + ... + 13855.

It is an arithmetic number, because the mean of its divisors is an integer number (5576571).

Almost surely, 2^22279429 is an apocalyptic number.

It is an amenable number.

22279429 is a deficient number, since it is larger than the sum of its proper divisors (26855).

22279429 is an equidigital number, since it uses as much as digits as its factorization.

22279429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26854.

The product of its digits is 36288, while the sum is 37.

The square root of 22279429 is about 4720.1090029786. The cubic root of 22279429 is about 281.3852653708.

The spelling of 22279429 in words is "twenty-two million, two hundred seventy-nine thousand, four hundred twenty-nine".