215441228 has 12 divisors (see below), whose sum is σ = 396865560. Its totient is φ = 102051072.

The previous prime is 215441197. The next prime is 215441257. The reversal of 215441228 is 822144512.

It is a self number, because there is not a number n which added to its sum of digits gives 215441228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417301 + ... + 1417452.

It is an arithmetic number, because the mean of its divisors is an integer number (33072130).

Almost surely, 2^215441228 is an apocalyptic number.

It is an amenable number.

215441228 is a deficient number, since it is larger than the sum of its proper divisors (181424332).

215441228 is a wasteful number, since it uses less digits than its factorization.

215441228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834776 (or 2834774 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 215441228 is about 14677.9163371372. The cubic root of 215441228 is about 599.4821717369.

The spelling of 215441228 in words is "two hundred fifteen million, four hundred forty-one thousand, two hundred twenty-eight".