22172292 has 36 divisors (see below), whose sum is σ = 58124976. Its totient is φ = 7390440.

The previous prime is 22172291. The next prime is 22172321. The reversal of 22172292 is 29227122.

22172292 is nontrivially palindromic in base 14.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×22172292² = 983221065066528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22172291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10434 + ... + 12377.

Almost surely, 2^22172292 is an apocalyptic number.

It is an amenable number.

22172292 is an abundant number, since it is smaller than the sum of its proper divisors (35952684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22172292 is a wasteful number, since it uses less digits than its factorization.

22172292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830 (or 22816 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22172292 is about 4708.7463299694. The cubic root of 22172292 is about 280.9334999655.

The spelling of 22172292 in words is "twenty-two million, one hundred seventy-two thousand, two hundred ninety-two".