22913172 has 48 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 7491744.

The previous prime is 22913171. The next prime is 22913179. The reversal of 22913172 is 27131922.

It is a super-2 number, since 2×22913172² = 1050026902203168, which contains 22 as substring.

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 (22913171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3723 + ... + 7725.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260).

Almost surely, 2^22913172 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 22913172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30270240).

22913172 is an abundant number, since it is smaller than the sum of its proper divisors (37627308).

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

22913172 is a wasteful number, since it uses less digits than its factorization.

22913172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069 (or 4061 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 22913172 is about 4786.7705188363. The cubic root of 22913172 is about 284.0283810822.

The spelling of 22913172 in words is "twenty-two million, nine hundred thirteen thousand, one hundred seventy-two".