227221218 has 192 divisors, whose sum is σ = 635102208. Its totient is φ = 57231360.

The previous prime is 227221151. The next prime is 227221219. The reversal of 227221218 is 812122722.

227221218 is a `hidden beast` number, since 227 + 221 + 218 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 227221191 and 227221200.

It is not an unprimeable number, because it can be changed into a prime (227221219) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3724908 + ... + 3724968.

It is an arithmetic number, because the mean of its divisors is an integer number (3307824).

Almost surely, 2^227221218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 227221218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317551104).

227221218 is an abundant number, since it is smaller than the sum of its proper divisors (407880990).

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

227221218 is a wasteful number, since it uses less digits than its factorization.

227221218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 174 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 227221218 is about 15073.8587627721. The cubic root of 227221218 is about 610.2151153879.

It can be divided in two parts, 227 and 221218, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 227221218 in words is "two hundred twenty-seven million, two hundred twenty-one thousand, two hundred eighteen".