302230021 has 2 divisors, whose sum is σ = 302230022. Its totient is φ = 302230020.

The previous prime is 302230003. The next prime is 302230039. The reversal of 302230021 is 120032203.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (302230003) and next prime (302230039).

It can be written as a sum of positive squares in only one way, i.e., 290327521 + 11902500 = 17039^2 + 3450^2 .

It is a cyclic number.

It is not a de Polignac number, because 302230021 - 2¹¹ = 302227973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 302229983 and 302230010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (302270021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151115010 + 151115011.

It is an arithmetic number, because the mean of its divisors is an integer number (151115011).

Almost surely, 2^302230021 is an apocalyptic number.

It is an amenable number.

302230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

302230021 is an equidigital number, since it uses as much as digits as its factorization.

302230021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 302230021 is about 17384.7640478667. The cubic root of 302230021 is about 671.0875786964.

Adding to 302230021 its reverse (120032203), we get a palindrome (422262224).

The spelling of 302230021 in words is "three hundred two million, two hundred thirty thousand, twenty-one".