22555320 has 64 divisors (see below), whose sum is σ = 68372640. Its totient is φ = 5952000.

The previous prime is 22555319. The next prime is 22555339. The reversal of 22555320 is 2355522.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11190 + ... + 13050.

Almost surely, 2^22555320 is an apocalyptic number.

22555320 is a gapful number since it is divisible by the number (20) 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 22555320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34186320).

22555320 is an abundant number, since it is smaller than the sum of its proper divisors (45817320).

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

22555320 is a wasteful number, since it uses less digits than its factorization.

22555320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 22555320 is about 4749.2441503886. The cubic root of 22555320 is about 282.5419886945.

The spelling of 22555320 in words is "twenty-two million, five hundred fifty-five thousand, three hundred twenty".