1143718221 has 8 divisors (see below), whose sum is σ = 1525526944. Its totient is φ = 762194160.

The previous prime is 1143718187. The next prime is 1143718223. The reversal of 1143718221 is 1228173411.

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

It is not a de Polignac number, because 1143718221 - 2⁶ = 1143718157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143718223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61606 + ... + 77991.

It is an arithmetic number, because the mean of its divisors is an integer number (190690868).

Almost surely, 2^1143718221 is an apocalyptic number.

It is an amenable number.

1143718221 is a deficient number, since it is larger than the sum of its proper divisors (381808723).

1143718221 is a wasteful number, since it uses less digits than its factorization.

1143718221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142331.

The product of its digits is 2688, while the sum is 30.

The square root of 1143718221 is about 33818.9033086527. The cubic root of 1143718221 is about 1045.7784302446.

The spelling of 1143718221 in words is "one billion, one hundred forty-three million, seven hundred eighteen thousand, two hundred twenty-one".