1143140231 has 8 divisors (see below), whose sum is σ = 1217383344. Its totient is φ = 1069674880.

The previous prime is 1143140209. The next prime is 1143140233. The reversal of 1143140231 is 1320413411.

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

It is a cyclic number.

It is not a de Polignac number, because 1143140231 - 2²⁶ = 1076031367 is a prime.

It is a super-2 number, since 2×1143140231² = 2613539175461466722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143140233) 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, 191405 + ... + 197286.

It is an arithmetic number, because the mean of its divisors is an integer number (152172918).

Almost surely, 2^1143140231 is an apocalyptic number.

1143140231 is a deficient number, since it is larger than the sum of its proper divisors (74243113).

1143140231 is a wasteful number, since it uses less digits than its factorization.

1143140231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388881.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1143140231 is about 33810.3568599919. The cubic root of 1143140231 is about 1045.6022355275.

Adding to 1143140231 its reverse (1320413411), we get a palindrome (2463553642).

The spelling of 1143140231 in words is "one billion, one hundred forty-three million, one hundred forty thousand, two hundred thirty-one".