22072172 has 6 divisors (see below), whose sum is σ = 38626308. Its totient is φ = 11036084.

The previous prime is 22072163. The next prime is 22072181. The reversal of 22072172 is 27127022.

It is an interprime number because it is at equal distance from previous prime (22072163) and next prime (22072181).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2759018 + ... + 2759025.

It is an arithmetic number, because the mean of its divisors is an integer number (6437718).

Almost surely, 2^22072172 is an apocalyptic number.

It is an amenable number.

22072172 is a deficient number, since it is larger than the sum of its proper divisors (16554136).

22072172 is a wasteful number, since it uses less digits than its factorization.

22072172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518047 (or 5518045 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 22072172 is about 4698.1030214332. The cubic root of 22072172 is about 280.5100058602.

Adding to 22072172 its reverse (27127022), we get a palindrome (49199194).

The spelling of 22072172 in words is "twenty-two million, seventy-two thousand, one hundred seventy-two".