221382115 has 16 divisors (see below), whose sum is σ = 271232640. Its totient is φ = 173416320.

The previous prime is 221382097. The next prime is 221382131. The reversal of 221382115 is 511283122.

It is not a de Polignac number, because 221382115 - 2⁹ = 221381603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221382115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71377 + ... + 74413.

It is an arithmetic number, because the mean of its divisors is an integer number (16952040).

Almost surely, 2^221382115 is an apocalyptic number.

221382115 is a deficient number, since it is larger than the sum of its proper divisors (49850525).

221382115 is a wasteful number, since it uses less digits than its factorization.

221382115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342.

The product of its digits is 960, while the sum is 25.

The square root of 221382115 is about 14878.9151150210. The cubic root of 221382115 is about 604.9426123195.

The spelling of 221382115 in words is "two hundred twenty-one million, three hundred eighty-two thousand, one hundred fifteen".