231145143 has 16 divisors (see below), whose sum is σ = 310581600. Its totient is φ = 152908416.

The previous prime is 231145111. The next prime is 231145151. The reversal of 231145143 is 341541132.

It is a happy number.

It is not a de Polignac number, because 231145143 - 2⁵ = 231145111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231145163) 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, 289621 + ... + 290417.

It is an arithmetic number, because the mean of its divisors is an integer number (19411350).

Almost surely, 2^231145143 is an apocalyptic number.

231145143 is a deficient number, since it is larger than the sum of its proper divisors (79436457).

231145143 is a wasteful number, since it uses less digits than its factorization.

231145143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426.

The product of its digits is 1440, while the sum is 24.

The square root of 231145143 is about 15203.4582579096. The cubic root of 231145143 is about 613.7077260535.

Adding to 231145143 its reverse (341541132), we get a palindrome (572686275).

The spelling of 231145143 in words is "two hundred thirty-one million, one hundred forty-five thousand, one hundred forty-three".