111113520 has 240 divisors, whose sum is σ = 421520640. Its totient is φ = 23652864.

The previous prime is 111113507. The next prime is 111113521. The reversal of 111113520 is 25311111.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111113520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111113521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1883251 + ... + 1883309.

It is an arithmetic number, because the mean of its divisors is an integer number (1756336).

Almost surely, 2^111113520 is an apocalyptic number.

111113520 is a gapful number since it is divisible by the number (10) 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 111113520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210760320).

111113520 is an abundant number, since it is smaller than the sum of its proper divisors (310407120).

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

111113520 is a wasteful number, since it uses less digits than its factorization.

111113520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 111113520 is about 10541.0397969081. The cubic root of 111113520 is about 480.7533309630.

Adding to 111113520 its reverse (25311111), we get a palindrome (136424631).

The spelling of 111113520 in words is "one hundred eleven million, one hundred thirteen thousand, five hundred twenty".