22145452 has 24 divisors (see below), whose sum is σ = 45197600. Its totient is φ = 9490320.

The previous prime is 22145449. The next prime is 22145471. The reversal of 22145452 is 25454122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6699 + ... + 9442.

Almost surely, 2^22145452 is an apocalyptic number.

It is an amenable number.

22145452 is an abundant number, since it is smaller than the sum of its proper divisors (23052148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22145452 is a wasteful number, since it uses less digits than its factorization.

22145452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16166 (or 16150 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 22145452 is about 4705.8954514524. The cubic root of 22145452 is about 280.8200956660.

Adding to 22145452 its reverse (25454122), we get a palindrome (47599574).

The spelling of 22145452 in words is "twenty-two million, one hundred forty-five thousand, four hundred fifty-two".