1143434231 has 16 divisors (see below), whose sum is σ = 1226521440. Its totient is φ = 1062835200.

The previous prime is 1143434179. The next prime is 1143434233. The reversal of 1143434231 is 1324343411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1143434231 - 2³⁰ = 69692407 is a prime.

It is a super-2 number, since 2×1143434231² = 2614883681245122722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1143434231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143434233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214211 + ... + 219483.

It is an arithmetic number, because the mean of its divisors is an integer number (76657590).

Almost surely, 2^1143434231 is an apocalyptic number.

1143434231 is a deficient number, since it is larger than the sum of its proper divisors (83087209).

1143434231 is a wasteful number, since it uses less digits than its factorization.

1143434231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506.

The product of its digits is 3456, while the sum is 26.

The square root of 1143434231 is about 33814.7043606772. The cubic root of 1143434231 is about 1045.6918660322.

Adding to 1143434231 its reverse (1324343411), we get a palindrome (2467777642).

The spelling of 1143434231 in words is "one billion, one hundred forty-three million, four hundred thirty-four thousand, two hundred thirty-one".