22621522 has 16 divisors (see below), whose sum is σ = 42305472. Its totient is φ = 8813520.

The previous prime is 22621519. The next prime is 22621553. The reversal of 22621522 is 22512622.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22621493 and 22621502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73293 + ... + 73600.

It is an arithmetic number, because the mean of its divisors is an integer number (2644092).

Almost surely, 2^22621522 is an apocalyptic number.

22621522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22621522 is a deficient number, since it is larger than the sum of its proper divisors (19683950).

22621522 is a wasteful number, since it uses less digits than its factorization.

22621522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146913.

The product of its digits is 960, while the sum is 22.

The square root of 22621522 is about 4756.2087843155. The cubic root of 22621522 is about 282.8181478497.

Subtracting from 22621522 its reverse (22512622), we obtain a square (108900 = 330²).

The spelling of 22621522 in words is "twenty-two million, six hundred twenty-one thousand, five hundred twenty-two".