22172402 has 24 divisors (see below), whose sum is σ = 39333420. Its totient is φ = 9344160.

The previous prime is 22172399. The next prime is 22172413. The reversal of 22172402 is 20427122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18412681 + 3759721 = 4291^2 + 1939^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4124 + ... + 7832.

Almost surely, 2^22172402 is an apocalyptic number.

22172402 is a deficient number, since it is larger than the sum of its proper divisors (17161018).

22172402 is a wasteful number, since it uses less digits than its factorization.

22172402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786 (or 3779 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22172402 is about 4708.7580103463. The cubic root of 22172402 is about 280.9339645489.

Adding to 22172402 its reverse (20427122), we get a palindrome (42599524).

The spelling of 22172402 in words is "twenty-two million, one hundred seventy-two thousand, four hundred two".