22138215 has 16 divisors (see below), whose sum is σ = 38641536. Its totient is φ = 10733600.

The previous prime is 22138189. The next prime is 22138219. The reversal of 22138215 is 51283122.

It is not a de Polignac number, because 22138215 - 2⁷ = 22138087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66921 + ... + 67250.

It is an arithmetic number, because the mean of its divisors is an integer number (2415096).

Almost surely, 2^22138215 is an apocalyptic number.

22138215 is a deficient number, since it is larger than the sum of its proper divisors (16503321).

22138215 is a wasteful number, since it uses less digits than its factorization.

22138215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134190.

The product of its digits is 960, while the sum is 24.

The square root of 22138215 is about 4705.1264595120. The cubic root of 22138215 is about 280.7895022293.

The spelling of 22138215 in words is "twenty-two million, one hundred thirty-eight thousand, two hundred fifteen".