22161139 has 32 divisors (see below), whose sum is σ = 30159360. Its totient is φ = 15818400.

The previous prime is 22161131. The next prime is 22161179. The reversal of 22161139 is 93116122.

It is not a de Polignac number, because 22161139 - 2³ = 22161131 is a prime.

It is a super-2 number, since 2×22161139² = 982232163554642, which contains 22 as substring.

Its product of digits (648) is a multiple of the sum of its prime divisors (162).

It is not an unprimeable number, because it can be changed into a prime (22161131) 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, 169104 + ... + 169234.

It is an arithmetic number, because the mean of its divisors is an integer number (942480).

Almost surely, 2^22161139 is an apocalyptic number.

22161139 is a deficient number, since it is larger than the sum of its proper divisors (7998221).

22161139 is a wasteful number, since it uses less digits than its factorization.

22161139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 162 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The square root of 22161139 is about 4707.5618955039. The cubic root of 22161139 is about 280.8863874579.

It can be divided in two parts, 2216113 and 9, that added together give a palindrome (2216122).

The spelling of 22161139 in words is "twenty-two million, one hundred sixty-one thousand, one hundred thirty-nine".