22155672 has 128 divisors (see below), whose sum is σ = 72806400. Its totient is φ = 5443200.

The previous prime is 22155671. The next prime is 22155677. The reversal of 22155672 is 27655122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34797 + ... + 35427.

It is an arithmetic number, because the mean of its divisors is an integer number (568800).

Almost surely, 2^22155672 is an apocalyptic number.

22155672 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 22155672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36403200).

22155672 is an abundant number, since it is smaller than the sum of its proper divisors (50650728).

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

22155672 is a wasteful number, since it uses less digits than its factorization.

22155672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 673 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 22155672 is about 4706.9811981779. The cubic root of 22155672 is about 280.8632879807.

It can be divided in two parts, 2215 and 5672, that added together give a palindrome (7887).

The spelling of 22155672 in words is "twenty-two million, one hundred fifty-five thousand, six hundred seventy-two".