113235661 has 16 divisors (see below), whose sum is σ = 141713280. Its totient is φ = 87900480.

The previous prime is 113235637. The next prime is 113235667. The reversal of 113235661 is 166532311.

It is a cyclic number.

It is not a de Polignac number, because 113235661 - 2⁷ = 113235533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113235667) 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, 18675 + ... + 23983.

It is an arithmetic number, because the mean of its divisors is an integer number (8857080).

Almost surely, 2^113235661 is an apocalyptic number.

113235661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113235661 is a deficient number, since it is larger than the sum of its proper divisors (28477619).

113235661 is a wasteful number, since it uses less digits than its factorization.

113235661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604.

The product of its digits is 3240, while the sum is 28.

The square root of 113235661 is about 10641.2246005805. The cubic root of 113235661 is about 483.7946630860.

Adding to 113235661 its reverse (166532311), we get a palindrome (279767972).

It can be divided in two parts, 11323 and 5661, that multiplied together give a triangular number (64099503 = T₁₁₃₂₂).

The spelling of 113235661 in words is "one hundred thirteen million, two hundred thirty-five thousand, six hundred sixty-one".