221015226 has 16 divisors (see below), whose sum is σ = 442412928. Its totient is φ = 73608000.

The previous prime is 221015203. The next prime is 221015243. The reversal of 221015226 is 622510122.

It is a happy number.

221015226 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 8130 + ... + 22541.

It is an arithmetic number, because the mean of its divisors is an integer number (27650808).

Almost surely, 2^221015226 is an apocalyptic number.

221015226 is an abundant number, since it is smaller than the sum of its proper divisors (221397702).

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

221015226 is a wasteful number, since it uses less digits than its factorization.

221015226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31877.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 221015226 is about 14866.5808442964. The cubic root of 221015226 is about 604.6082439788.

Adding to 221015226 its reverse (622510122), we get a palindrome (843525348).

The spelling of 221015226 in words is "two hundred twenty-one million, fifteen thousand, two hundred twenty-six".