22207172 has 24 divisors (see below), whose sum is σ = 42544152. Its totient is φ = 10080000.

The previous prime is 22207153. The next prime is 22207189. The reversal of 22207172 is 27170222.

It can be written as a sum of positive squares in 4 ways, for example, as 454276 + 21752896 = 674^2 + 4664^2 .

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329 + ... + 6672.

It is an arithmetic number, because the mean of its divisors is an integer number (1772673).

Almost surely, 2^22207172 is an apocalyptic number.

It is an amenable number.

22207172 is a deficient number, since it is larger than the sum of its proper divisors (20336980).

22207172 is a wasteful number, since it uses less digits than its factorization.

22207172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079 (or 7077 counting only the distinct ones).

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

The square root of 22207172 is about 4712.4486204096. The cubic root of 22207172 is about 281.0807381883.

Adding to 22207172 its reverse (27170222), we get a palindrome (49377394).

The spelling of 22207172 in words is "twenty-two million, two hundred seven thousand, one hundred seventy-two".