143031431 has 2 divisors, whose sum is σ = 143031432. Its totient is φ = 143031430.

The previous prime is 143031419. The next prime is 143031439. The reversal of 143031431 is 134130341.

It is a strong prime.

It is an emirp because it is prime and its reverse (134130341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143031431 - 2⁶ = 143031367 is a prime.

It is a super-2 number, since 2×143031431² = 40915980507815522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143031439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71515715 + 71515716.

It is an arithmetic number, because the mean of its divisors is an integer number (71515716).

Almost surely, 2^143031431 is an apocalyptic number.

143031431 is a deficient number, since it is larger than the sum of its proper divisors (1).

143031431 is an equidigital number, since it uses as much as digits as its factorization.

143031431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 143031431 is about 11959.5748670260. The cubic root of 143031431 is about 522.9704633771.

Adding to 143031431 its reverse (134130341), we get a palindrome (277161772).

The spelling of 143031431 in words is "one hundred forty-three million, thirty-one thousand, four hundred thirty-one".