22563522 has 48 divisors (see below), whose sum is σ = 53700192. Its totient is φ = 7076160.

The previous prime is 22563521. The next prime is 22563533. The reversal of 22563522 is 22536522.

22563522 is a `hidden beast` number, since 2 + 2 + 5 + 635 + 22 = 666.

It is a super-2 number, since 2×22563522² = 1018225050088968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22563521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6897 + ... + 9627.

It is an arithmetic number, because the mean of its divisors is an integer number (1118754).

Almost surely, 2^22563522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22563522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26850096).

22563522 is an abundant number, since it is smaller than the sum of its proper divisors (31136670).

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

22563522 is a wasteful number, since it uses less digits than its factorization.

22563522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765 (or 2753 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 22563522 is about 4750.1075777292. The cubic root of 22563522 is about 282.5762323311.

Subtracting from 22563522 its reverse (22536522), we obtain a cube (27000 = 30³).

It can be divided in two parts, 2256 and 3522, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 22563522 in words is "twenty-two million, five hundred sixty-three thousand, five hundred twenty-two".