22323520 has 28 divisors (see below), whose sum is σ = 53158644. Its totient is φ = 8929280.

The previous prime is 22323491. The next prime is 22323523. The reversal of 22323520 is 2532322.

It can be written as a sum of positive squares in 2 ways, for example, as 12787776 + 9535744 = 3576^2 + 3088^2 .

It is a super-3 number, since 3×22323520³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22323523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34561 + ... + 35200.

It is an arithmetic number, because the mean of its divisors is an integer number (1898523).

Almost surely, 2^22323520 is an apocalyptic number.

22323520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22323520 is an abundant number, since it is smaller than the sum of its proper divisors (30835124).

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

22323520 is an equidigital number, since it uses as much as digits as its factorization.

22323520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69778 (or 69768 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 22323520 is about 4724.7772434264. Note that the first 3 decimals coincide. The cubic root of 22323520 is about 281.5707635797.

Adding to 22323520 its reverse (2532322), we get a palindrome (24855842).

The spelling of 22323520 in words is "twenty-two million, three hundred twenty-three thousand, five hundred twenty".