3143221228 has 72 divisors (see below), whose sum is σ = 6503444640. Its totient is φ = 1325237760.

The previous prime is 3143221201. The next prime is 3143221229. The reversal of 3143221228 is 8221223413.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 3143221196 and 3143221205.

It is not an unprimeable number, because it can be changed into a prime (3143221229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3567348 + ... + 3568228.

It is an arithmetic number, because the mean of its divisors is an integer number (90325620).

Almost surely, 2^3143221228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3143221228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3251722320).

3143221228 is an abundant number, since it is smaller than the sum of its proper divisors (3360223412).

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

3143221228 is a wasteful number, since it uses less digits than its factorization.

3143221228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1166 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 3143221228 is about 56064.4381760845. The cubic root of 3143221228 is about 1464.8449210911.

The spelling of 3143221228 in words is "three billion, one hundred forty-three million, two hundred twenty-one thousand, two hundred twenty-eight".