143631 has 6 divisors (see below), whose sum is σ = 207480. Its totient is φ = 95748.

The previous prime is 143629. The next prime is 143651. The reversal of 143631 is 136341.

It is not a de Polignac number, because 143631 - 2¹ = 143629 is a prime.

It is a super-2 number, since 2×143631² = 41259728322, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143631.

It is not an unprimeable number, because it can be changed into a prime (143651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7971 + ... + 7988.

It is an arithmetic number, because the mean of its divisors is an integer number (34580).

2¹⁴³⁶³¹ is an apocalyptic number.

143631 is a deficient number, since it is larger than the sum of its proper divisors (63849).

143631 is a wasteful number, since it uses less digits than its factorization.

143631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15965 (or 15962 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 143631 is about 378.9868071582. The cubic root of 143631 is about 52.3700185889.

Adding to 143631 its reverse (136341), we get a palindrome (279972).

The spelling of 143631 in words is "one hundred forty-three thousand, six hundred thirty-one".