230305931 has 2 divisors, whose sum is σ = 230305932. Its totient is φ = 230305930.

The previous prime is 230305891. The next prime is 230305961. The reversal of 230305931 is 139503032.

230305931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230305931 - 2¹⁸ = 230043787 is a prime.

It is a super-2 number, since 2×230305931² = 106081643707553522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230305931.

It is not a weakly prime, because it can be changed into another prime (230305961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115152965 + 115152966.

It is an arithmetic number, because the mean of its divisors is an integer number (115152966).

Almost surely, 2^230305931 is an apocalyptic number.

230305931 is a deficient number, since it is larger than the sum of its proper divisors (1).

230305931 is an equidigital number, since it uses as much as digits as its factorization.

230305931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 230305931 is about 15175.8337826954. The cubic root of 230305931 is about 612.9641017311.

Adding to 230305931 its reverse (139503032), we get a palindrome (369808963).

The spelling of 230305931 in words is "two hundred thirty million, three hundred five thousand, nine hundred thirty-one".