22138259 has 32 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 17297280.

The previous prime is 22138243. The next prime is 22138279. The reversal of 22138259 is 95283122.

It is a happy number.

It is not a de Polignac number, because 22138259 - 2⁴ = 22138243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22138219) 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 31 ways as a sum of consecutive naturals, for example, 174254 + ... + 174380.

It is an arithmetic number, because the mean of its divisors is an integer number (870912).

Almost surely, 2^22138259 is an apocalyptic number.

22138259 is a deficient number, since it is larger than the sum of its proper divisors (5730925).

22138259 is a wasteful number, since it uses less digits than its factorization.

22138259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227.

The product of its digits is 8640, while the sum is 32.

The square root of 22138259 is about 4705.1311352607. The cubic root of 22138259 is about 280.7896882535.

The spelling of 22138259 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred fifty-nine".