1143131213 has 8 divisors (see below), whose sum is σ = 1306667328. Its totient is φ = 979653024.

The previous prime is 1143131207. The next prime is 1143131237. The reversal of 1143131213 is 3121313411.

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

It is not a de Polignac number, because 1143131213 - 2⁶ = 1143131149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143131273) 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, 43070 + ... + 64352.

It is an arithmetic number, because the mean of its divisors is an integer number (163333416).

Almost surely, 2^1143131213 is an apocalyptic number.

It is an amenable number.

1143131213 is a deficient number, since it is larger than the sum of its proper divisors (163536115).

1143131213 is an equidigital number, since it uses as much as digits as its factorization.

1143131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28963.

The product of its digits is 216, while the sum is 20.

The square root of 1143131213 is about 33810.2234982261. The cubic root of 1143131213 is about 1045.5994860061.

Adding to 1143131213 its reverse (3121313411), we get a palindrome (4264444624).

The spelling of 1143131213 in words is "one billion, one hundred forty-three million, one hundred thirty-one thousand, two hundred thirteen".