113212044 has 144 divisors (see below), whose sum is σ = 336825216. Its totient is φ = 31680000.

The previous prime is 113212037. The next prime is 113212069. The reversal of 113212044 is 440212311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 450919 + ... + 451169.

It is an arithmetic number, because the mean of its divisors is an integer number (2339064).

Almost surely, 2^113212044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113212044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168412608).

113212044 is an abundant number, since it is smaller than the sum of its proper divisors (223613172).

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

113212044 is a wasteful number, since it uses less digits than its factorization.

113212044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 113212044 is about 10640.1148490042. The cubic root of 113212044 is about 483.7610265299.

Adding to 113212044 its reverse (440212311), we get a palindrome (553424355).

The spelling of 113212044 in words is "one hundred thirteen million, two hundred twelve thousand, forty-four".