22538516 has 72 divisors (see below), whose sum is σ = 53371584. Its totient is φ = 8087040.

The previous prime is 22538507. The next prime is 22538533. The reversal of 22538516 is 61583522.

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 23 ways as a sum of consecutive naturals, for example, 51836 + ... + 52268.

It is an arithmetic number, because the mean of its divisors is an integer number (741272).

Almost surely, 2^22538516 is an apocalyptic number.

22538516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22538516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26685792).

22538516 is an abundant number, since it is smaller than the sum of its proper divisors (30833068).

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

22538516 is a wasteful number, since it uses less digits than its factorization.

22538516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 466 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 22538516 is about 4747.4746971416. The cubic root of 22538516 is about 282.4718054719.

The spelling of 22538516 in words is "twenty-two million, five hundred thirty-eight thousand, five hundred sixteen".