Search a number
BaseRepresentation
bin100010000100100…
…0101011011011101
32221200012012210010
41010021011123131
54320131412341
6305235233433
740221212355
oct10411053335
92850165703
101143232221
1153736331a
1227aa48879
13152b09791
14abb93b65
156a575716
hex442456dd

1143232221 has 8 divisors (see below), whose sum is σ = 1538294560. Its totient is φ = 755162352.

The previous prime is 1143232193. The next prime is 1143232243. The reversal of 1143232221 is 1222323411.

Adding to 1143232221 its reverse (1222323411), we get a palindrome (2365555632).

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

It is not a de Polignac number, because 1143232221 - 27 = 1143232093 is a prime.

It is a super-2 number, since 2×11432322212 = 2613959822265185682, which contains 22 as substring.

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 (1143232021) 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, 1747735 + ... + 1748388.

It is an arithmetic number, because the mean of its divisors is an integer number (192286820).

Almost surely, 21143232221 is an apocalyptic number.

It is an amenable number.

1143232221 is a deficient number, since it is larger than the sum of its proper divisors (395062339).

1143232221 is a wasteful number, since it uses less digits than its factorization.

1143232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496235.

The product of its digits is 576, while the sum is 21.

The square root of 1143232221 is about 33811.7172145988. The cubic root of 1143232221 is about 1045.6302817716.

The spelling of 1143232221 in words is "one billion, one hundred forty-three million, two hundred thirty-two thousand, two hundred twenty-one".