22355622 has 64 divisors (see below), whose sum is σ = 52093440. Its totient is φ = 7099488.

The previous prime is 22355621. The next prime is 22355623. The reversal of 22355622 is 22655322.

22355622 is a `hidden beast` number, since 2 + 2 + 35 + 5 + 622 = 666.

It is an interprime number because it is at equal distance from previous prime (22355621) and next prime (22355623).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22355621) 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 31 ways as a sum of consecutive naturals, for example, 133783 + ... + 133949.

It is an arithmetic number, because the mean of its divisors is an integer number (813960).

Almost surely, 2^22355622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22355622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26046720).

22355622 is an abundant number, since it is smaller than the sum of its proper divisors (29737818).

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

22355622 is a wasteful number, since it uses less digits than its factorization.

22355622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 276 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 22355622 is about 4728.1732201771. The cubic root of 22355622 is about 281.7056684591.

The spelling of 22355622 in words is "twenty-two million, three hundred fifty-five thousand, six hundred twenty-two".