231012143 has 2 divisors, whose sum is σ = 231012144. Its totient is φ = 231012142.

The previous prime is 231012113. The next prime is 231012151. The reversal of 231012143 is 341210132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231012143 - 2⁶ = 231012079 is a prime.

It is a super-2 number, since 2×231012143² = 106733220426904898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231012113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115506071 + 115506072.

It is an arithmetic number, because the mean of its divisors is an integer number (115506072).

Almost surely, 2^231012143 is an apocalyptic number.

231012143 is a deficient number, since it is larger than the sum of its proper divisors (1).

231012143 is an equidigital number, since it uses as much as digits as its factorization.

231012143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231012143 is about 15199.0836236926. The cubic root of 231012143 is about 613.5899951382.

Adding to 231012143 its reverse (341210132), we get a palindrome (572222275).

The spelling of 231012143 in words is "two hundred thirty-one million, twelve thousand, one hundred forty-three".