22138265 has 8 divisors (see below), whose sum is σ = 26603208. Its totient is φ = 17685760.

The previous prime is 22138243. The next prime is 22138279. The reversal of 22138265 is 56283122.

It can be written as a sum of positive squares in 4 ways, for example, as 4857616 + 17280649 = 2204^2 + 4157^2 .

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

It is not a de Polignac number, because 22138265 - 2²⁴ = 5361049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1409 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (3325401).

Almost surely, 2^22138265 is an apocalyptic number.

It is an amenable number.

22138265 is a deficient number, since it is larger than the sum of its proper divisors (4464943).

22138265 is an equidigital number, since it uses as much as digits as its factorization.

22138265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219.

The product of its digits is 5760, while the sum is 29.

The square root of 22138265 is about 4705.1317728625. The cubic root of 22138265 is about 280.7897136204.

The spelling of 22138265 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred sixty-five".