111513888 has 96 divisors (see below), whose sum is σ = 342417600. Its totient is φ = 35209728.

The previous prime is 111513887. The next prime is 111513889. The reversal of 111513888 is 888315111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111513887) and next prime (111513889).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (111513887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13020 + ... + 19812.

It is an arithmetic number, because the mean of its divisors is an integer number (3566850).

Almost surely, 2^111513888 is an apocalyptic number.

111513888 is a gapful number since it is divisible by the number (18) 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 111513888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171208800).

111513888 is an abundant number, since it is smaller than the sum of its proper divisors (230903712).

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

111513888 is a wasteful number, since it uses less digits than its factorization.

111513888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831 (or 6817 counting only the distinct ones).

The product of its digits is 7680, while the sum is 36.

The square root of 111513888 is about 10560.0136363548. The cubic root of 111513888 is about 481.3300610492.

Adding to 111513888 its reverse (888315111), we get a palindrome (999828999).

The spelling of 111513888 in words is "one hundred eleven million, five hundred thirteen thousand, eight hundred eighty-eight".