297313221 has 16 divisors (see below), whose sum is σ = 424799424. Its totient is φ = 184299264.

The previous prime is 297313217. The next prime is 297313243. The reversal of 297313221 is 122313792.

It is not a de Polignac number, because 297313221 - 2² = 297313217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297313271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30886 + ... + 39351.

It is an arithmetic number, because the mean of its divisors is an integer number (26549964).

Almost surely, 2^297313221 is an apocalyptic number.

It is an amenable number.

297313221 is a deficient number, since it is larger than the sum of its proper divisors (127486203).

297313221 is a wasteful number, since it uses less digits than its factorization.

297313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70340.

The product of its digits is 4536, while the sum is 30.

The square root of 297313221 is about 17242.7730078430. The cubic root of 297313221 is about 667.4284893022.

The spelling of 297313221 in words is "two hundred ninety-seven million, three hundred thirteen thousand, two hundred twenty-one".