221014809 has 12 divisors (see below), whose sum is σ = 320104356. Its totient is φ = 146945952.

The previous prime is 221014777. The next prime is 221014811. The reversal of 221014809 is 908410122.

221014809 is digitally balanced in base 2, 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 69355584 + 151659225 = 8328^2 + 12315^2 .

It is not a de Polignac number, because 221014809 - 2⁵ = 221014777 is a prime.

It is a super-3 number, since 3×221014809³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (221014879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29562 + ... + 36275.

It is an arithmetic number, because the mean of its divisors is an integer number (26675363).

Almost surely, 2^221014809 is an apocalyptic number.

It is an amenable number.

221014809 is a deficient number, since it is larger than the sum of its proper divisors (99089547).

221014809 is a wasteful number, since it uses less digits than its factorization.

221014809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66216 (or 66213 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 221014809 is about 14866.5668195451. The cubic root of 221014809 is about 604.6078637308.

The spelling of 221014809 in words is "two hundred twenty-one million, fourteen thousand, eight hundred nine".