22103172 has 144 divisors (see below), whose sum is σ = 71326080. Its totient is φ = 5795712.

The previous prime is 22103131. The next prime is 22103197. The reversal of 22103172 is 27130122.

It is a super-3 number, since 3×22103172³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127678 + ... + 127850.

It is an arithmetic number, because the mean of its divisors is an integer number (495320).

Almost surely, 2^22103172 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 22103172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35663040).

22103172 is an abundant number, since it is smaller than the sum of its proper divisors (49222908).

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

22103172 is a wasteful number, since it uses less digits than its factorization.

22103172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 22103172 is about 4701.4010677669. The cubic root of 22103172 is about 280.6412683131.

Adding to 22103172 its reverse (27130122), we get a palindrome (49233294).

The spelling of 22103172 in words is "twenty-two million, one hundred three thousand, one hundred seventy-two".