113203155 has 16 divisors (see below), whose sum is σ = 195058080. Its totient is φ = 55730688.

The previous prime is 113203109. The next prime is 113203157. The reversal of 113203155 is 551302311.

It is not a de Polignac number, because 113203155 - 2²⁰ = 112154579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113203157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290070 + ... + 290459.

It is an arithmetic number, because the mean of its divisors is an integer number (12191130).

Almost surely, 2^113203155 is an apocalyptic number.

113203155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

113203155 is a deficient number, since it is larger than the sum of its proper divisors (81854925).

113203155 is a wasteful number, since it uses less digits than its factorization.

113203155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580550.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 113203155 is about 10639.6971291480. The cubic root of 113203155 is about 483.7483651435.

Adding to 113203155 its reverse (551302311), we get a palindrome (664505466).

The spelling of 113203155 in words is "one hundred thirteen million, two hundred three thousand, one hundred fifty-five".