305530031 has 2 divisors, whose sum is σ = 305530032. Its totient is φ = 305530030.

The previous prime is 305530021. The next prime is 305530061. The reversal of 305530031 is 130035503.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 305530031 - 2¹⁸ = 305267887 is a prime.

It is a super-2 number, since 2×305530031² = 186697199685721922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 305529985 and 305530012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305530021) 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 as a sum of consecutive naturals, namely, 152765015 + 152765016.

It is an arithmetic number, because the mean of its divisors is an integer number (152765016).

Almost surely, 2^305530031 is an apocalyptic number.

305530031 is a deficient number, since it is larger than the sum of its proper divisors (1).

305530031 is an equidigital number, since it uses as much as digits as its factorization.

305530031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 20.

The square root of 305530031 is about 17479.4173529898. The cubic root of 305530031 is about 673.5212482138.

Adding to 305530031 its reverse (130035503), we get a palindrome (435565534).

The spelling of 305530031 in words is "three hundred five million, five hundred thirty thousand, thirty-one".