23117112 has 72 divisors (see below), whose sum is σ = 64509120. Its totient is φ = 7478400.

The previous prime is 23117111. The next prime is 23117141. The reversal of 23117112 is 21171132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×23117112³ (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23117111) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 120937 + ... + 121127.

It is an arithmetic number, because the mean of its divisors is an integer number (895960).

Almost surely, 2^23117112 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 23117112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32254560).

23117112 is an abundant number, since it is smaller than the sum of its proper divisors (41392008).

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

23117112 is a wasteful number, since it uses less digits than its factorization.

23117112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 237 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 23117112 is about 4808.0257902802. The cubic root of 23117112 is about 284.8685635855.

Adding to 23117112 its reverse (21171132), we get a palindrome (44288244).

The spelling of 23117112 in words is "twenty-three million, one hundred seventeen thousand, one hundred twelve".