22090171 has 4 divisors (see below), whose sum is σ = 22111200. Its totient is φ = 22069144.

The previous prime is 22090153. The next prime is 22090177. The reversal of 22090171 is 17109022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22090171 - 2⁵ = 22090139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22090177) 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, 8851 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (5527800).

Almost surely, 2^22090171 is an apocalyptic number.

22090171 is a deficient number, since it is larger than the sum of its proper divisors (21029).

22090171 is a wasteful number, since it uses less digits than its factorization.

22090171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21028.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 22090171 is about 4700.0181914542. The cubic root of 22090171 is about 280.5862334863.

Adding to 22090171 its reverse (17109022), we get a palindrome (39199193).

The spelling of 22090171 in words is "twenty-two million, ninety thousand, one hundred seventy-one".