113212500 has 72 divisors (see below), whose sum is σ = 330291360. Its totient is φ = 30180000.

The previous prime is 113212487. The next prime is 113212501. The reversal of 113212500 is 5212311.

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 113212500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113212501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35991 + ... + 39009.

It is an arithmetic number, because the mean of its divisors is an integer number (4587380).

Almost surely, 2^113212500 is an apocalyptic number.

113212500 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 113212500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165145680).

113212500 is an abundant number, since it is smaller than the sum of its proper divisors (217078860).

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

113212500 is an equidigital number, since it uses as much as digits as its factorization.

113212500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 113212500 is about 10640.1362773228. The cubic root of 113212500 is about 483.7616760330.

Adding to 113212500 its reverse (5212311), we get a palindrome (118424811).

The spelling of 113212500 in words is "one hundred thirteen million, two hundred twelve thousand, five hundred".