305223031 has 2 divisors, whose sum is σ = 305223032. Its totient is φ = 305223030.

The previous prime is 305223007. The next prime is 305223059. The reversal of 305223031 is 130322503.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 305223031 - 2¹³ = 305214839 is a prime.

It is a super-2 number, since 2×305223031² = 186322197305653922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305223071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152611515 + 152611516.

It is an arithmetic number, because the mean of its divisors is an integer number (152611516).

Almost surely, 2^305223031 is an apocalyptic number.

305223031 is a deficient number, since it is larger than the sum of its proper divisors (1).

305223031 is an equidigital number, since it uses as much as digits as its factorization.

305223031 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 19.

The square root of 305223031 is about 17470.6333886325. The cubic root of 305223031 is about 673.2955853807.

Adding to 305223031 its reverse (130322503), we get a palindrome (435545534).

The spelling of 305223031 in words is "three hundred five million, two hundred twenty-three thousand, thirty-one".