1143431001 has 48 divisors (see below), whose sum is σ = 1838753280. Its totient is φ = 681696000.

The previous prime is 1143430979. The next prime is 1143431027. The reversal of 1143431001 is 1001343411.

It is not a de Polignac number, because 1143431001 - 2¹³ = 1143422809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143431071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214711 + ... + 219971.

It is an arithmetic number, because the mean of its divisors is an integer number (38307360).

Almost surely, 2^1143431001 is an apocalyptic number.

It is an amenable number.

1143431001 is a deficient number, since it is larger than the sum of its proper divisors (695322279).

1143431001 is a wasteful number, since it uses less digits than its factorization.

1143431001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358 (or 5355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1143431001 is about 33814.6566003560. The cubic root of 1143431001 is about 1045.6908813996.

Adding to 1143431001 its reverse (1001343411), we get a palindrome (2144774412).

The spelling of 1143431001 in words is "one billion, one hundred forty-three million, four hundred thirty-one thousand, one".