113111520 has 96 divisors (see below), whose sum is σ = 361428480. Its totient is φ = 29729280.

The previous prime is 113111491. The next prime is 113111527. The reversal of 113111520 is 25111311.

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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 113111520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113111527) 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, 32421 + ... + 35739.

It is an arithmetic number, because the mean of its divisors is an integer number (3764880).

Almost surely, 2^113111520 is an apocalyptic number.

113111520 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 113111520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180714240).

113111520 is an abundant number, since it is smaller than the sum of its proper divisors (248316960).

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

113111520 is a wasteful number, since it uses less digits than its factorization.

113111520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3408 (or 3400 counting only the distinct ones).

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

The square root of 113111520 is about 10635.3899787455. The cubic root of 113111520 is about 483.6178026820.

Adding to 113111520 its reverse (25111311), we get a palindrome (138222831).

The spelling of 113111520 in words is "one hundred thirteen million, one hundred eleven thousand, five hundred twenty".