22351172 has 6 divisors (see below), whose sum is σ = 39114558. Its totient is φ = 11175584.

The previous prime is 22351169. The next prime is 22351177. The reversal of 22351172 is 27115322.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12716356 + 9634816 = 3566^2 + 3104^2 .

It is not an unprimeable number, because it can be changed into a prime (22351177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2793893 + ... + 2793900.

It is an arithmetic number, because the mean of its divisors is an integer number (6519093).

Almost surely, 2^22351172 is an apocalyptic number.

It is an amenable number.

22351172 is a deficient number, since it is larger than the sum of its proper divisors (16763386).

22351172 is a wasteful number, since it uses less digits than its factorization.

22351172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587797 (or 5587795 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 22351172 is about 4727.7026133208. The cubic root of 22351172 is about 281.6869755711.

Adding to 22351172 its reverse (27115322), we get a palindrome (49466494).

The spelling of 22351172 in words is "twenty-two million, three hundred fifty-one thousand, one hundred seventy-two".