22161489 has 32 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 11396352.

The previous prime is 22161479. The next prime is 22161499. The reversal of 22161489 is 98416122.

It is an interprime number because it is at equal distance from previous prime (22161479) and next prime (22161499).

It is not a de Polignac number, because 22161489 - 2¹⁵ = 22128721 is a prime.

It is a super-2 number, since 2×22161489² = 982263189394242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22161449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6862 + ... + 9560.

It is an arithmetic number, because the mean of its divisors is an integer number (1166400).

Almost surely, 2^22161489 is an apocalyptic number.

It is an amenable number.

22161489 is a deficient number, since it is larger than the sum of its proper divisors (15163311).

22161489 is a wasteful number, since it uses less digits than its factorization.

22161489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its digits is 6912, while the sum is 33.

The square root of 22161489 is about 4707.5990695895. The cubic root of 22161489 is about 280.8878661682.

The spelling of 22161489 in words is "twenty-two million, one hundred sixty-one thousand, four hundred eighty-nine".