302221421 has 8 divisors (see below), whose sum is σ = 309031680. Its totient is φ = 295427088.

The previous prime is 302221417. The next prime is 302221433. The reversal of 302221421 is 124122203.

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 302221421 - 2² = 302221417 is a prime.

It is a super-2 number, since 2×302221421² = 182675574622518482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 302221421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302221481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39695 + ... + 46691.

It is an arithmetic number, because the mean of its divisors is an integer number (38628960).

Almost surely, 2^302221421 is an apocalyptic number.

It is an amenable number.

302221421 is a deficient number, since it is larger than the sum of its proper divisors (6810259).

302221421 is an equidigital number, since it uses as much as digits as its factorization.

302221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 302221421 is about 17384.5167030896. The cubic root of 302221421 is about 671.0812133372.

Adding to 302221421 its reverse (124122203), we get a palindrome (426343624).

The spelling of 302221421 in words is "three hundred two million, two hundred twenty-one thousand, four hundred twenty-one".