305032421 has 2 divisors, whose sum is σ = 305032422. Its totient is φ = 305032420.

The previous prime is 305032379. The next prime is 305032433. The reversal of 305032421 is 124230503.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233020225 + 72012196 = 15265^2 + 8486^2 .

It is an emirp because it is prime and its reverse (124230503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 305032421 - 2²⁶ = 237923557 is a prime.

It is a super-2 number, since 2×305032421² = 186089555722242482, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 305032393 and 305032402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305032621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152516210 + 152516211.

It is an arithmetic number, because the mean of its divisors is an integer number (152516211).

Almost surely, 2^305032421 is an apocalyptic number.

It is an amenable number.

305032421 is a deficient number, since it is larger than the sum of its proper divisors (1).

305032421 is an equidigital number, since it uses as much as digits as its factorization.

305032421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 305032421 is about 17465.1773824373. The cubic root of 305032421 is about 673.1553998082.

Adding to 305032421 its reverse (124230503), we get a palindrome (429262924).

The spelling of 305032421 in words is "three hundred five million, thirty-two thousand, four hundred twenty-one".