113811143 has 4 divisors (see below), whose sum is σ = 114938088. Its totient is φ = 112684200.

The previous prime is 113811133. The next prime is 113811179. The reversal of 113811143 is 341118311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113811143 - 2²⁰ = 112762567 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 (113811133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563321 + ... + 563522.

It is an arithmetic number, because the mean of its divisors is an integer number (28734522).

Almost surely, 2^113811143 is an apocalyptic number.

113811143 is a deficient number, since it is larger than the sum of its proper divisors (1126945).

113811143 is a wasteful number, since it uses less digits than its factorization.

113811143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126944.

The product of its digits is 288, while the sum is 23.

The square root of 113811143 is about 10668.2305468152. The cubic root of 113811143 is about 484.6128529117.

Adding to 113811143 its reverse (341118311), we get a palindrome (454929454).

The spelling of 113811143 in words is "one hundred thirteen million, eight hundred eleven thousand, one hundred forty-three".