22255722 has 80 divisors (see below), whose sum is σ = 52968960. Its totient is φ = 6975072.

The previous prime is 22255693. The next prime is 22255741. The reversal of 22255722 is 22755222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 281679 + ... + 281757.

It is an arithmetic number, because the mean of its divisors is an integer number (662112).

Almost surely, 2^22255722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22255722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26484480).

22255722 is an abundant number, since it is smaller than the sum of its proper divisors (30713238).

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

22255722 is a wasteful number, since it uses less digits than its factorization.

22255722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 168 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 22255722 is about 4717.5970578251. The cubic root of 22255722 is about 281.2854248712.

Subtracting 22255722 from its reverse (22755222), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 22255722 in words is "twenty-two million, two hundred fifty-five thousand, seven hundred twenty-two".