22145252 has 12 divisors (see below), whose sum is σ = 38922156. Its totient is φ = 11024640.

The previous prime is 22145243. The next prime is 22145269. The reversal of 22145252 is 25254122.

It can be written as a sum of positive squares in 2 ways, for example, as 8202496 + 13942756 = 2864^2 + 3734^2 .

It is a super-2 number, since 2×22145252² = 980824372287008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10949 + ... + 12812.

It is an arithmetic number, because the mean of its divisors is an integer number (3243513).

Almost surely, 2^22145252 is an apocalyptic number.

It is an amenable number.

22145252 is a deficient number, since it is larger than the sum of its proper divisors (16776904).

22145252 is a wasteful number, since it uses less digits than its factorization.

22145252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23998 (or 23996 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 22145252 is about 4705.8742014635. The cubic root of 22145252 is about 280.8192502827.

Adding to 22145252 its reverse (25254122), we get a palindrome (47399374).

The spelling of 22145252 in words is "twenty-two million, one hundred forty-five thousand, two hundred fifty-two".