299221 has 4 divisors (see below), whose sum is σ = 322252. Its totient is φ = 276192.

The previous prime is 299213. The next prime is 299239. The reversal of 299221 is 122992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 202500 = 311^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 299221 - 2³ = 299213 is a prime.

It is a Duffinian number.

299221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (299261) 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, 11496 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (80563).

2²⁹⁹²²¹ is an apocalyptic number.

It is an amenable number.

299221 is a deficient number, since it is larger than the sum of its proper divisors (23031).

299221 is a wasteful number, since it uses less digits than its factorization.

299221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23030.

The product of its digits is 648, while the sum is 25.

The square root of 299221 is about 547.0109688114. The cubic root of 299221 is about 66.8853016418.

The spelling of 299221 in words is "two hundred ninety-nine thousand, two hundred twenty-one".