22255920 has 60 divisors (see below), whose sum is σ = 74745216. Its totient is φ = 5934720.

The previous prime is 22255903. The next prime is 22255939. The reversal of 22255920 is 2955222.

It is a tau number, because it is divible by the number of its divisors (60).

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 11 ways as a sum of consecutive naturals, for example, 14736 + ... + 16175.

Almost surely, 2^22255920 is an apocalyptic number.

22255920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22255920 is an abundant number, since it is smaller than the sum of its proper divisors (52489296).

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

22255920 is a wasteful number, since it uses less digits than its factorization.

22255920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30930 (or 30921 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22255920 is about 4717.6180430382. The cubic root of 22255920 is about 281.2862590290.

The spelling of 22255920 in words is "twenty-two million, two hundred fifty-five thousand, nine hundred twenty".