22117140 has 144 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 5370624.

The previous prime is 22117103. The next prime is 22117171. The reversal of 22117140 is 4171122.

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

It is a congruent number.

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, 99069 + ... + 99291.

It is an arithmetic number, because the mean of its divisors is an integer number (509600).

Almost surely, 2^22117140 is an apocalyptic number.

22117140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22117140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36691200).

22117140 is an abundant number, since it is smaller than the sum of its proper divisors (51265260).

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

22117140 is a wasteful number, since it uses less digits than its factorization.

22117140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 22117140 is about 4702.8863477656. The cubic root of 22117140 is about 280.7003725265.

Adding to 22117140 its reverse (4171122), we get a palindrome (26288262).

The spelling of 22117140 in words is "twenty-two million, one hundred seventeen thousand, one hundred forty".