22172272 has 10 divisors (see below), whose sum is σ = 42958808. Its totient is φ = 11086128.

The previous prime is 22172261. The next prime is 22172273. The reversal of 22172272 is 27227122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22172273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692868 + ... + 692899.

Almost surely, 2^22172272 is an apocalyptic number.

It is an amenable number.

22172272 is a deficient number, since it is larger than the sum of its proper divisors (20786536).

22172272 is a wasteful number, since it uses less digits than its factorization.

22172272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385775 (or 1385769 counting only the distinct ones).

The product of its digits is 1568, while the sum is 25.

The square root of 22172272 is about 4708.7442062614. The cubic root of 22172272 is about 280.9334154957.

Adding to 22172272 its reverse (27227122), we get a palindrome (49399394).

It can be divided in two parts, 2217 and 2272, that added together give a square (4489 = 67²).

The spelling of 22172272 in words is "twenty-two million, one hundred seventy-two thousand, two hundred seventy-two".