143013231 has 24 divisors (see below), whose sum is σ = 219243024. Its totient is φ = 89521920.

The previous prime is 143013229. The next prime is 143013257. The reversal of 143013231 is 132310341.

143013231 is a `hidden beast` number, since 1 + 430 + 1 + 3 + 231 = 666.

143013231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 143013231 - 2¹ = 143013229 is a prime.

It is a super-2 number, since 2×143013231² = 40905568482118722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143013331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86545 + ... + 88181.

It is an arithmetic number, because the mean of its divisors is an integer number (9135126).

Almost surely, 2^143013231 is an apocalyptic number.

143013231 is a deficient number, since it is larger than the sum of its proper divisors (76229793).

143013231 is a wasteful number, since it uses less digits than its factorization.

143013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231 (or 2228 counting only the distinct ones).

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

The square root of 143013231 is about 11958.8139462072. The cubic root of 143013231 is about 522.9482806859.

Adding to 143013231 its reverse (132310341), we get a palindrome (275323572).

The spelling of 143013231 in words is "one hundred forty-three million, thirteen thousand, two hundred thirty-one".