305131223 has 2 divisors, whose sum is σ = 305131224. Its totient is φ = 305131222.

The previous prime is 305131207. The next prime is 305131261. The reversal of 305131223 is 322131503.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 305131223 - 2⁴ = 305131207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 305131195 and 305131204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152565611 + 152565612.

It is an arithmetic number, because the mean of its divisors is an integer number (152565612).

Almost surely, 2^305131223 is an apocalyptic number.

305131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

305131223 is an equidigital number, since it uses as much as digits as its factorization.

305131223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 305131223 is about 17468.0056961291. The cubic root of 305131223 is about 673.2280717775.

Adding to 305131223 its reverse (322131503), we get a palindrome (627262726).

The spelling of 305131223 in words is "three hundred five million, one hundred thirty-one thousand, two hundred twenty-three".