231251143 has 2 divisors, whose sum is σ = 231251144. Its totient is φ = 231251142.

The previous prime is 231251117. The next prime is 231251161. The reversal of 231251143 is 341152132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231251143 - 2¹³ = 231242951 is a prime.

It is a super-2 number, since 2×231251143² = 106954182277612898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231251743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115625571 + 115625572.

It is an arithmetic number, because the mean of its divisors is an integer number (115625572).

Almost surely, 2^231251143 is an apocalyptic number.

231251143 is a deficient number, since it is larger than the sum of its proper divisors (1).

231251143 is an equidigital number, since it uses as much as digits as its factorization.

231251143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 231251143 is about 15206.9439073076. The cubic root of 231251143 is about 613.8015243722.

The spelling of 231251143 in words is "two hundred thirty-one million, two hundred fifty-one thousand, one hundred forty-three".