113805681 has 32 divisors (see below), whose sum is σ = 174182400. Its totient is φ = 65457600.

The previous prime is 113805661. The next prime is 113805691. The reversal of 113805681 is 186508311.

It is not a de Polignac number, because 113805681 - 2⁶ = 113805617 is a prime.

It is a super-2 number, since 2×113805681² = 25903466055747522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (113805641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53170 + ... + 55268.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^113805681 is an apocalyptic number.

113805681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113805681 is a deficient number, since it is larger than the sum of its proper divisors (60376719).

113805681 is a wasteful number, since it uses less digits than its factorization.

113805681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 113805681 is about 10667.9745500259. The cubic root of 113805681 is about 484.6051003089.

The spelling of 113805681 in words is "one hundred thirteen million, eight hundred five thousand, six hundred eighty-one".