221267 has 4 divisors (see below), whose sum is σ = 222720. Its totient is φ = 219816.

The previous prime is 221261. The next prime is 221281. The reversal of 221267 is 762122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 762122 = 2 ⋅381061.

It is a cyclic number.

It is not a de Polignac number, because 221267 - 2⁴ = 221251 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467 + ... + 812.

It is an arithmetic number, because the mean of its divisors is an integer number (55680).

2²²¹²⁶⁷ is an apocalyptic number.

221267 is a deficient number, since it is larger than the sum of its proper divisors (1453).

221267 is a wasteful number, since it uses less digits than its factorization.

221267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its digits is 336, while the sum is 20.

The square root of 221267 is about 470.3902635047. The cubic root of 221267 is about 60.4837740791.

Adding to 221267 its reverse (762122), we get a palindrome (983389).

The spelling of 221267 in words is "two hundred twenty-one thousand, two hundred sixty-seven".