22277556 has 108 divisors (see below), whose sum is σ = 66787812. Its totient is φ = 6241536.

The previous prime is 22277551. The next prime is 22277573. The reversal of 22277556 is 65577222.

It can be written as a sum of positive squares in 2 ways, for example, as 16941456 + 5336100 = 4116^2 + 2310^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 22277556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22277551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 128686 + ... + 128858.

Almost surely, 2^22277556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22277556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33393906).

22277556 is an abundant number, since it is smaller than the sum of its proper divisors (44510256).

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

22277556 is a wasteful number, since it uses less digits than its factorization.

22277556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 258 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 22277556 is about 4719.9105923735. The cubic root of 22277556 is about 281.3773799297.

The spelling of 22277556 in words is "twenty-two million, two hundred seventy-seven thousand, five hundred fifty-six".