22173256 has 32 divisors (see below), whose sum is σ = 48300480. Its totient is φ = 9345600.

The previous prime is 22173227. The next prime is 22173259. The reversal of 22173256 is 65237122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (22173259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171 + ... + 6661.

It is an arithmetic number, because the mean of its divisors is an integer number (1509390).

Almost surely, 2^22173256 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 22173256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24150240).

22173256 is an abundant number, since it is smaller than the sum of its proper divisors (26127224).

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

22173256 is a wasteful number, since it uses less digits than its factorization.

22173256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6565 (or 6561 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 22173256 is about 4708.8486915593. The cubic root of 22173256 is about 280.9375713529.

The spelling of 22173256 in words is "twenty-two million, one hundred seventy-three thousand, two hundred fifty-six".