143142631 has 2 divisors, whose sum is σ = 143142632. Its totient is φ = 143142630.

The previous prime is 143142613. The next prime is 143142653. The reversal of 143142631 is 136241341.

Together with previous prime (143142613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143142631 is a prime.

It is a super-2 number, since 2×143142631² = 40979625619204322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143142596 and 143142605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143142691) 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, 71571315 + 71571316.

It is an arithmetic number, because the mean of its divisors is an integer number (71571316).

Almost surely, 2^143142631 is an apocalyptic number.

143142631 is a deficient number, since it is larger than the sum of its proper divisors (1).

143142631 is an equidigital number, since it uses as much as digits as its factorization.

143142631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 143142631 is about 11964.2229584708. Note that the first 3 decimals coincide. The cubic root of 143142631 is about 523.1059563264.

Adding to 143142631 its reverse (136241341), we get a palindrome (279383972).

The spelling of 143142631 in words is "one hundred forty-three million, one hundred forty-two thousand, six hundred thirty-one".