305140331 has 2 divisors, whose sum is σ = 305140332. Its totient is φ = 305140330.

The previous prime is 305140289. The next prime is 305140337. The reversal of 305140331 is 133041503.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305140331 - 2⁶ = 305140267 is a prime.

It is a super-2 number, since 2×305140331² = 186221243205579122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (305140337) 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 as a sum of consecutive naturals, namely, 152570165 + 152570166.

It is an arithmetic number, because the mean of its divisors is an integer number (152570166).

Almost surely, 2^305140331 is an apocalyptic number.

305140331 is a deficient number, since it is larger than the sum of its proper divisors (1).

305140331 is an equidigital number, since it uses as much as digits as its factorization.

305140331 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 305140331 is about 17468.2663993883. The cubic root of 305140331 is about 673.2347702074.

Adding to 305140331 its reverse (133041503), we get a palindrome (438181834).

The spelling of 305140331 in words is "three hundred five million, one hundred forty thousand, three hundred thirty-one".