22145524 has 6 divisors (see below), whose sum is σ = 38754674. Its totient is φ = 11072760.

The previous prime is 22145521. The next prime is 22145533. The reversal of 22145524 is 42554122.

It can be written as a sum of positive squares in only one way, i.e., 15069924 + 7075600 = 3882^2 + 2660^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22145521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2768187 + ... + 2768194.

Almost surely, 2^22145524 is an apocalyptic number.

It is an amenable number.

22145524 is a deficient number, since it is larger than the sum of its proper divisors (16609150).

22145524 is a wasteful number, since it uses less digits than its factorization.

22145524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536385 (or 5536383 counting only the distinct ones).

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

The square root of 22145524 is about 4705.9031014248. The cubic root of 22145524 is about 280.8204000027.

Adding to 22145524 its reverse (42554122), we get a palindrome (64699646).

The spelling of 22145524 in words is "twenty-two million, one hundred forty-five thousand, five hundred twenty-four".