22090161 has 4 divisors (see below), whose sum is σ = 29453552. Its totient is φ = 14726772.

The previous prime is 22090153. The next prime is 22090177. The reversal of 22090161 is 16109022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22090161 - 2³ = 22090153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22090111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3681691 + ... + 3681696.

It is an arithmetic number, because the mean of its divisors is an integer number (7363388).

Almost surely, 2^22090161 is an apocalyptic number.

It is an amenable number.

22090161 is a deficient number, since it is larger than the sum of its proper divisors (7363391).

22090161 is an equidigital number, since it uses as much as digits as its factorization.

22090161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7363390.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 22090161 is about 4700.0171276284. The cubic root of 22090161 is about 280.5861911468.

Adding to 22090161 its reverse (16109022), we get a palindrome (38199183).

The spelling of 22090161 in words is "twenty-two million, ninety thousand, one hundred sixty-one".