143331431 has 2 divisors, whose sum is σ = 143331432. Its totient is φ = 143331430.

The previous prime is 143331389. The next prime is 143331439. The reversal of 143331431 is 134133341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143331431 - 2²² = 139137127 is a prime.

It is a super-2 number, since 2×143331431² = 41087798225015522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 143331397 and 143331406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143331439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71665715 + 71665716.

It is an arithmetic number, because the mean of its divisors is an integer number (71665716).

Almost surely, 2^143331431 is an apocalyptic number.

143331431 is a deficient number, since it is larger than the sum of its proper divisors (1).

143331431 is an equidigital number, since it uses as much as digits as its factorization.

143331431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 143331431 is about 11972.1105491054. The cubic root of 143331431 is about 523.3358412887.

Adding to 143331431 its reverse (134133341), we get a palindrome (277464772).

The spelling of 143331431 in words is "one hundred forty-three million, three hundred thirty-one thousand, four hundred thirty-one".