22521552 has 40 divisors (see below), whose sum is σ = 58892064. Its totient is φ = 7415424.

The previous prime is 22521533. The next prime is 22521563. The reversal of 22521552 is 25512522.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 1158 + ... + 6810.

Almost surely, 2^22521552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22521552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29446032).

22521552 is an abundant number, since it is smaller than the sum of its proper divisors (36370512).

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

22521552 is a wasteful number, since it uses less digits than its factorization.

22521552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747 (or 5741 counting only the distinct ones).

The product of its digits is 2000, while the sum is 24.

The square root of 22521552 is about 4745.6877267684. The cubic root of 22521552 is about 282.4009186037.

The spelling of 22521552 in words is "twenty-two million, five hundred twenty-one thousand, five hundred fifty-two".