22232520 has 48 divisors (see below), whose sum is σ = 72256860. Its totient is φ = 5928576.

The previous prime is 22232503. The next prime is 22232521. The reversal of 22232520 is 2523222.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 1602756 = 4542^2 + 1266^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22232493 and 22232502.

It is not an unprimeable number, because it can be changed into a prime (22232521) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 30519 + ... + 31238.

Almost surely, 2^22232520 is an apocalyptic number.

22232520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22232520 is an abundant number, since it is smaller than the sum of its proper divisors (50024340).

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

22232520 is a wasteful number, since it uses less digits than its factorization.

22232520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61774 (or 61767 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22232520 is about 4715.1373256778. The cubic root of 22232520 is about 281.1876424717.

Adding to 22232520 its reverse (2523222), we get a palindrome (24755742).

The spelling of 22232520 in words is "twenty-two million, two hundred thirty-two thousand, five hundred twenty".