111143391 has 16 divisors (see below), whose sum is σ = 153183744. Its totient is φ = 71637824.

The previous prime is 111143371. The next prime is 111143393. The reversal of 111143391 is 193341111.

It is a cyclic number.

It is not a de Polignac number, because 111143391 - 2⁹ = 111142879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143393) 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, 6955 + ... + 16451.

It is an arithmetic number, because the mean of its divisors is an integer number (9573984).

Almost surely, 2^111143391 is an apocalyptic number.

111143391 is a deficient number, since it is larger than the sum of its proper divisors (42040353).

111143391 is an equidigital number, since it uses as much as digits as its factorization.

111143391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630.

The product of its digits is 324, while the sum is 24.

The square root of 111143391 is about 10542.4565922749. The cubic root of 111143391 is about 480.7964079173.

The spelling of 111143391 in words is "one hundred eleven million, one hundred forty-three thousand, three hundred ninety-one".