221259272 has 16 divisors (see below), whose sum is σ = 446773740. Its totient is φ = 102119616.

The previous prime is 221259257. The next prime is 221259289. The reversal of 221259272 is 272952122.

It is a happy number.

221259272 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 201242596 + 20016676 = 14186^2 + 4474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063643 + ... + 1063850.

Almost surely, 2^221259272 is an apocalyptic number.

It is an amenable number.

221259272 is an abundant number, since it is smaller than the sum of its proper divisors (225514468).

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

221259272 is a wasteful number, since it uses less digits than its factorization.

221259272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127512 (or 2127508 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 221259272 is about 14874.7864522487. The cubic root of 221259272 is about 604.8306991616.

The spelling of 221259272 in words is "two hundred twenty-one million, two hundred fifty-nine thousand, two hundred seventy-two".