1143304213 has 4 divisors (see below), whose sum is σ = 1210557420. Its totient is φ = 1076051008.

The previous prime is 1143304199. The next prime is 1143304249. The reversal of 1143304213 is 3124033411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 974875729 + 168428484 = 31223^2 + 12978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143304213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143304313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33626578 + ... + 33626611.

It is an arithmetic number, because the mean of its divisors is an integer number (302639355).

Almost surely, 2^1143304213 is an apocalyptic number.

It is an amenable number.

1143304213 is a deficient number, since it is larger than the sum of its proper divisors (67253207).

1143304213 is an equidigital number, since it uses as much as digits as its factorization.

1143304213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67253206.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1143304213 is about 33812.7817991954. The cubic root of 1143304213 is about 1045.6522299036.

Adding to 1143304213 its reverse (3124033411), we get a palindrome (4267337624).

The spelling of 1143304213 in words is "one billion, one hundred forty-three million, three hundred four thousand, two hundred thirteen".