221283 has 12 divisors (see below), whose sum is σ = 333840. Its totient is φ = 140976.

The previous prime is 221281. The next prime is 221303. The reversal of 221283 is 382122.

It is a happy number.

221283 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 221283 - 2¹ = 221281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221281) 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, 328 + ... + 741.

It is an arithmetic number, because the mean of its divisors is an integer number (27820).

2²²¹²⁸³ is an apocalyptic number.

221283 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221283 is a deficient number, since it is larger than the sum of its proper divisors (112557).

221283 is a wasteful number, since it uses less digits than its factorization.

221283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1095 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 221283 is about 470.4072703520. The cubic root of 221283 is about 60.4852319212.

The spelling of 221283 in words is "two hundred twenty-one thousand, two hundred eighty-three".