1143172218 has 16 divisors (see below), whose sum is σ = 2288557440. Its totient is φ = 380688576.

The previous prime is 1143172193. The next prime is 1143172229. The reversal of 1143172218 is 8122713411.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85455 + ... + 97922.

It is an arithmetic number, because the mean of its divisors is an integer number (143034840).

Almost surely, 2^1143172218 is an apocalyptic number.

1143172218 is an abundant number, since it is smaller than the sum of its proper divisors (1145385222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1143172218 is a wasteful number, since it uses less digits than its factorization.

1143172218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184421.

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

The square root of 1143172218 is about 33810.8298922106. The cubic root of 1143172218 is about 1045.6119880105.

Adding to 1143172218 its reverse (8122713411), we get a palindrome (9265885629).

The spelling of 1143172218 in words is "one billion, one hundred forty-three million, one hundred seventy-two thousand, two hundred eighteen".