113643551 has 16 divisors (see below), whose sum is σ = 135475200. Its totient is φ = 93277440.

The previous prime is 113643533. The next prime is 113643557. The reversal of 113643551 is 155346311.

It is a cyclic number.

It is not a de Polignac number, because 113643551 - 2²⁶ = 46534687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113643557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18350 + ... + 23748.

It is an arithmetic number, because the mean of its divisors is an integer number (8467200).

Almost surely, 2^113643551 is an apocalyptic number.

113643551 is a deficient number, since it is larger than the sum of its proper divisors (21831649).

113643551 is an equidigital number, since it uses as much as digits as its factorization.

113643551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5534.

The product of its digits is 5400, while the sum is 29.

The square root of 113643551 is about 10660.3729296868. The cubic root of 113643551 is about 484.3748646881.

Adding to 113643551 its reverse (155346311), we get a palindrome (268989862).

The spelling of 113643551 in words is "one hundred thirteen million, six hundred forty-three thousand, five hundred fifty-one".