302243221 has 24 divisors (see below), whose sum is σ = 375860736. Its totient is φ = 241476480.

The previous prime is 302243213. The next prime is 302243233. The reversal of 302243221 is 122342203.

It is not a de Polignac number, because 302243221 - 2³ = 302243213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302243251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87436 + ... + 90826.

It is an arithmetic number, because the mean of its divisors is an integer number (15660864).

Almost surely, 2^302243221 is an apocalyptic number.

It is an amenable number.

302243221 is a deficient number, since it is larger than the sum of its proper divisors (73617515).

302243221 is a wasteful number, since it uses less digits than its factorization.

302243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529 (or 3522 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 302243221 is about 17385.1436864928. The cubic root of 302243221 is about 671.0973485477.

Adding to 302243221 its reverse (122342203), we get a palindrome (424585424).

The spelling of 302243221 in words is "three hundred two million, two hundred forty-three thousand, two hundred twenty-one".