230311031 has 2 divisors, whose sum is σ = 230311032. Its totient is φ = 230311030.

The previous prime is 230311009. The next prime is 230311057. The reversal of 230311031 is 130113032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 230311031 - 2¹⁰ = 230310007 is a prime.

It is a super-2 number, since 2×230311031² = 106086342000565922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 230310997 and 230311015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230311001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115155515 + 115155516.

It is an arithmetic number, because the mean of its divisors is an integer number (115155516).

Almost surely, 2^230311031 is an apocalyptic number.

230311031 is a deficient number, since it is larger than the sum of its proper divisors (1).

230311031 is an equidigital number, since it uses as much as digits as its factorization.

230311031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 230311031 is about 15176.0018120716. The cubic root of 230311031 is about 612.9686262836.

Adding to 230311031 its reverse (130113032), we get a palindrome (360424063).

The spelling of 230311031 in words is "two hundred thirty million, three hundred eleven thousand, thirty-one".