302220221 has 4 divisors (see below), whose sum is σ = 302269344. Its totient is φ = 302171100.

The previous prime is 302220187. The next prime is 302220227. The reversal of 302220221 is 122022203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 302220221 - 2⁶ = 302220157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 302220196 and 302220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302220227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13745 + ... + 28166.

It is an arithmetic number, because the mean of its divisors is an integer number (75567336).

Almost surely, 2^302220221 is an apocalyptic number.

It is an amenable number.

302220221 is a deficient number, since it is larger than the sum of its proper divisors (49123).

302220221 is an equidigital number, since it uses as much as digits as its factorization.

302220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49122.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 302220221 is about 17384.4821895851. The cubic root of 302220221 is about 671.0803251380.

Adding to 302220221 its reverse (122022203), we get a palindrome (424242424).

The spelling of 302220221 in words is "three hundred two million, two hundred twenty thousand, two hundred twenty-one".