231730143 has 8 divisors (see below), whose sum is σ = 309968256. Its totient is φ = 153989400.

The previous prime is 231730063. The next prime is 231730201. The reversal of 231730143 is 341037132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231730143 - 2²⁰ = 230681567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231730843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123253 + ... + 125118.

It is an arithmetic number, because the mean of its divisors is an integer number (38746032).

Almost surely, 2^231730143 is an apocalyptic number.

231730143 is a deficient number, since it is larger than the sum of its proper divisors (78238113).

231730143 is a wasteful number, since it uses less digits than its factorization.

231730143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248685.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 231730143 is about 15222.6851442182. The cubic root of 231730143 is about 614.2250295431.

Adding to 231730143 its reverse (341037132), we get a palindrome (572767275).

The spelling of 231730143 in words is "two hundred thirty-one million, seven hundred thirty thousand, one hundred forty-three".