303141221 has 4 divisors (see below), whose sum is σ = 304000332. Its totient is φ = 302282112.

The previous prime is 303141217. The next prime is 303141227. The reversal of 303141221 is 122141303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97792321 + 205348900 = 9889^2 + 14330^2 .

It is a cyclic number.

It is not a de Polignac number, because 303141221 - 2² = 303141217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 303141221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303141227) 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 3 ways as a sum of consecutive naturals, for example, 429026 + ... + 429731.

It is an arithmetic number, because the mean of its divisors is an integer number (76000083).

Almost surely, 2^303141221 is an apocalyptic number.

It is an amenable number.

303141221 is a deficient number, since it is larger than the sum of its proper divisors (859111).

303141221 is an equidigital number, since it uses as much as digits as its factorization.

303141221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859110.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 303141221 is about 17410.9511802199. The cubic root of 303141221 is about 671.7613276623.

Adding to 303141221 its reverse (122141303), we get a palindrome (425282524).

The spelling of 303141221 in words is "three hundred three million, one hundred forty-one thousand, two hundred twenty-one".