297221 has 8 divisors (see below), whose sum is σ = 316920. Its totient is φ = 278208.

The previous prime is 297191. The next prime is 297233. The reversal of 297221 is 122792.

297221 = 385² + 386².

It can be written as a sum of positive squares in 4 ways, for example, as 57121 + 240100 = 239^2 + 490^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 297221 - 2¹⁴ = 280837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 297221.

It is not an unprimeable number, because it can be changed into a prime (297251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (39615).

2²⁹⁷²²¹ is an apocalyptic number.

297221 is the 386-th centered square number.

It is an amenable number.

297221 is a deficient number, since it is larger than the sum of its proper divisors (19699).

297221 is a wasteful number, since it uses less digits than its factorization.

297221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

The product of its digits is 504, while the sum is 23.

The square root of 297221 is about 545.1797868593. The cubic root of 297221 is about 66.7359474222.

The spelling of 297221 in words is "two hundred ninety-seven thousand, two hundred twenty-one".