231136143 has 8 divisors (see below), whose sum is σ = 352207488. Its totient is φ = 132077784.

The previous prime is 231136141. The next prime is 231136163. The reversal of 231136143 is 341631132.

It is a happy number.

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

It is not a de Polignac number, because 231136143 - 2¹ = 231136141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231136141) 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, 5503221 + ... + 5503262.

It is an arithmetic number, because the mean of its divisors is an integer number (44025936).

Almost surely, 2^231136143 is an apocalyptic number.

231136143 is a deficient number, since it is larger than the sum of its proper divisors (121071345).

231136143 is a wasteful number, since it uses less digits than its factorization.

231136143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006493.

The product of its digits is 1296, while the sum is 24.

The square root of 231136143 is about 15203.1622697385. The cubic root of 231136143 is about 613.6997607247.

Adding to 231136143 its reverse (341631132), we get a palindrome (572767275).

The spelling of 231136143 in words is "two hundred thirty-one million, one hundred thirty-six thousand, one hundred forty-three".