22117144 has 32 divisors (see below), whose sum is σ = 47704320. Its totient is φ = 9416736.

The previous prime is 22117103. The next prime is 22117171. The reversal of 22117144 is 44171122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7917 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (1490760).

Almost surely, 2^22117144 is an apocalyptic number.

It is an amenable number.

22117144 is an abundant number, since it is smaller than the sum of its proper divisors (25587176).

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

22117144 is a wasteful number, since it uses less digits than its factorization.

22117144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2595 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 22117144 is about 4702.8867730363. The cubic root of 22117144 is about 280.7003894486.

Adding to 22117144 its reverse (44171122), we get a palindrome (66288266).

The spelling of 22117144 in words is "twenty-two million, one hundred seventeen thousand, one hundred forty-four".