113811558 has 64 divisors (see below), whose sum is σ = 276234240. Its totient is φ = 30536352.

The previous prime is 113811557. The next prime is 113811589. The reversal of 113811558 is 855118311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113811557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100785 + ... + 101907.

It is an arithmetic number, because the mean of its divisors is an integer number (4316160).

Almost surely, 2^113811558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113811558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138117120).

113811558 is an abundant number, since it is smaller than the sum of its proper divisors (162422682).

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

113811558 is a wasteful number, since it uses less digits than its factorization.

113811558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its digits is 4800, while the sum is 33.

The square root of 113811558 is about 10668.2499970707. The cubic root of 113811558 is about 484.6134419404.

Adding to 113811558 its reverse (855118311), we get a palindrome (968929869).

The spelling of 113811558 in words is "one hundred thirteen million, eight hundred eleven thousand, five hundred fifty-eight".