143712631 has 4 divisors (see below), whose sum is σ = 144092200. Its totient is φ = 143333064.

The previous prime is 143712629. The next prime is 143712643. The reversal of 143712631 is 136217341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136217341 = 13 ⋅10478257.

It is a cyclic number.

It is not a de Polignac number, because 143712631 - 2¹ = 143712629 is a prime.

It is a super-2 number, since 2×143712631² = 41306640617884322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143712631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143712131) 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 in 3 ways as a sum of consecutive naturals, for example, 189216 + ... + 189973.

It is an arithmetic number, because the mean of its divisors is an integer number (36023050).

Almost surely, 2^143712631 is an apocalyptic number.

143712631 is a deficient number, since it is larger than the sum of its proper divisors (379569).

143712631 is an equidigital number, since it uses as much as digits as its factorization.

143712631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379568.

The product of its digits is 3024, while the sum is 28.

The square root of 143712631 is about 11988.0203119614. The cubic root of 143712631 is about 523.7993800595.

Adding to 143712631 its reverse (136217341), we get a palindrome (279929972).

The spelling of 143712631 in words is "one hundred forty-three million, seven hundred twelve thousand, six hundred thirty-one".