22255992 has 256 divisors, whose sum is σ = 77760000. Its totient is φ = 5806080.

The previous prime is 22255967. The next prime is 22255997. The reversal of 22255992 is 29955222.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (32400) is a multiple of the sum of its prime divisors (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255997) 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 63 ways as a sum of consecutive naturals, for example, 767434 + ... + 767462.

It is an arithmetic number, because the mean of its divisors is an integer number (303750).

Almost surely, 2^22255992 is an apocalyptic number.

22255992 is a gapful number since it is divisible by the number (22) 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 22255992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38880000).

22255992 is an abundant number, since it is smaller than the sum of its proper divisors (55504008).

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

22255992 is a wasteful number, since it uses less digits than its factorization.

22255992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 81 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 22255992 is about 4717.6256740017. The cubic root of 22255992 is about 281.2865623578.

The spelling of 22255992 in words is "twenty-two million, two hundred fifty-five thousand, nine hundred ninety-two".