1143440513 has 4 divisors (see below), whose sum is σ = 1171329348. Its totient is φ = 1115551680.

The previous prime is 1143440509. The next prime is 1143440521. The reversal of 1143440513 is 3150443411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3150443411 = 16831 ⋅187181.

It can be written as a sum of positive squares in 2 ways, for example, as 326452624 + 816987889 = 18068^2 + 28583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143440513 - 2² = 1143440509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143440503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13944356 + ... + 13944437.

It is an arithmetic number, because the mean of its divisors is an integer number (292832337).

Almost surely, 2^1143440513 is an apocalyptic number.

It is an amenable number.

1143440513 is a deficient number, since it is larger than the sum of its proper divisors (27888835).

1143440513 is an equidigital number, since it uses as much as digits as its factorization.

1143440513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27888834.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1143440513 is about 33814.7972491334. The cubic root of 1143440513 is about 1045.6937810306.

Adding to 1143440513 its reverse (3150443411), we get a palindrome (4293883924).

The spelling of 1143440513 in words is "one billion, one hundred forty-three million, four hundred forty thousand, five hundred thirteen".