131112143 has 4 divisors (see below), whose sum is σ = 138824640. Its totient is φ = 123399648.

The previous prime is 131112139. The next prime is 131112169. The reversal of 131112143 is 341211131.

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 131112143 - 2² = 131112139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7712479 = 131112143 / (1 + 3 + 1 + 1 + 1 + 2 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131112173) 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, 3856223 + ... + 3856256.

It is an arithmetic number, because the mean of its divisors is an integer number (34706160).

Almost surely, 2^131112143 is an apocalyptic number.

131112143 is a deficient number, since it is larger than the sum of its proper divisors (7712497).

131112143 is an equidigital number, since it uses as much as digits as its factorization.

131112143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712496.

The product of its digits is 72, while the sum is 17.

The square root of 131112143 is about 11450.4210839602. The cubic root of 131112143 is about 508.0201892797.

Adding to 131112143 its reverse (341211131), we get a palindrome (472323274).

The spelling of 131112143 in words is "one hundred thirty-one million, one hundred twelve thousand, one hundred forty-three".