113144520 has 128 divisors (see below), whose sum is σ = 369360000. Its totient is φ = 27611136.

The previous prime is 113144519. The next prime is 113144539. The reversal of 113144520 is 25441311.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74731 + ... + 76229.

It is an arithmetic number, because the mean of its divisors is an integer number (2885625).

Almost surely, 2^113144520 is an apocalyptic number.

113144520 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 113144520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184680000).

113144520 is an abundant number, since it is smaller than the sum of its proper divisors (256215480).

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

113144520 is a wasteful number, since it uses less digits than its factorization.

113144520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 113144520 is about 10636.9412896753. The cubic root of 113144520 is about 483.6648295328.

Adding to 113144520 its reverse (25441311), we get a palindrome (138585831).

The spelling of 113144520 in words is "one hundred thirteen million, one hundred forty-four thousand, five hundred twenty".