22155224 has 48 divisors (see below), whose sum is σ = 51430320. Its totient is φ = 8760960.

The previous prime is 22155223. The next prime is 22155227. The reversal of 22155224 is 42255122.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22155224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8294 + ... + 10634.

It is an arithmetic number, because the mean of its divisors is an integer number (1071465).

Almost surely, 2^22155224 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 22155224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25715160).

22155224 is an abundant number, since it is smaller than the sum of its proper divisors (29275096).

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

22155224 is a wasteful number, since it uses less digits than its factorization.

22155224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380 (or 2363 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 22155224 is about 4706.9336090495. The cubic root of 22155224 is about 280.8613948974.

The spelling of 22155224 in words is "twenty-two million, one hundred fifty-five thousand, two hundred twenty-four".