221082265 has 8 divisors (see below), whose sum is σ = 266646600. Its totient is φ = 175967232.

The previous prime is 221082259. The next prime is 221082299. The reversal of 221082265 is 562280122.

It can be written as a sum of positive squares in 4 ways, for example, as 103489929 + 117592336 = 10173^2 + 10844^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221082265 - 2¹⁵ = 221049497 is a prime.

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, 111240 + ... + 113209.

It is an arithmetic number, because the mean of its divisors is an integer number (33330825).

Almost surely, 2^221082265 is an apocalyptic number.

It is an amenable number.

221082265 is a deficient number, since it is larger than the sum of its proper divisors (45564335).

221082265 is a wasteful number, since it uses less digits than its factorization.

221082265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224651.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 221082265 is about 14868.8353612514. The cubic root of 221082265 is about 604.6693683266.

The spelling of 221082265 in words is "two hundred twenty-one million, eighty-two thousand, two hundred sixty-five".