1143232431 has 8 divisors (see below), whose sum is σ = 1662883584. Its totient is φ = 692868120.

The previous prime is 1143232379. The next prime is 1143232459. The reversal of 1143232431 is 1342323411.

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 1143232431 - 2¹¹ = 1143230383 is a prime.

It is a super-2 number, since 2×1143232431² = 2613960782580339522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143232471) 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, 17321671 + ... + 17321736.

It is an arithmetic number, because the mean of its divisors is an integer number (207860448).

Almost surely, 2^1143232431 is an apocalyptic number.

1143232431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1143232431 is a deficient number, since it is larger than the sum of its proper divisors (519651153).

1143232431 is a wasteful number, since it uses less digits than its factorization.

1143232431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34643421.

The product of its digits is 1728, while the sum is 24.

The square root of 1143232431 is about 33811.7203200310. The cubic root of 1143232431 is about 1045.6303457954.

Adding to 1143232431 its reverse (1342323411), we get a palindrome (2485555842).

The spelling of 1143232431 in words is "one billion, one hundred forty-three million, two hundred thirty-two thousand, four hundred thirty-one".