113203505205 has 128 divisors (see below), whose sum is σ = 238872499200. Its totient is φ = 49768169472.

The previous prime is 113203505197. The next prime is 113203505227. The reversal of 113203505205 is 502505302311.

It is a happy number.

113203505205 is a `hidden beast` number, since 1 + 132 + 0 + 3 + 5 + 0 + 520 + 5 = 666.

It is not a de Polignac number, because 113203505205 - 2³ = 113203505197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 7035049 + ... + 7051121.

It is an arithmetic number, because the mean of its divisors is an integer number (1866191400).

Almost surely, 2^113203505205 is an apocalyptic number.

113203505205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

113203505205 is an abundant number, since it is smaller than the sum of its proper divisors (125668993995).

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

113203505205 is a wasteful number, since it uses less digits than its factorization.

113203505205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380 (or 16374 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 113203505205 its reverse (502505302311), we get a palindrome (615708807516).

The spelling of 113203505205 in words is "one hundred thirteen billion, two hundred three million, five hundred five thousand, two hundred five".