231030281 has 2 divisors, whose sum is σ = 231030282. Its totient is φ = 231030280.

The previous prime is 231030209. The next prime is 231030287. The reversal of 231030281 is 182030132.

231030281 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 can be written as a sum of positive squares in only one way, i.e., 218892025 + 12138256 = 14795^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 231030281 - 2¹⁴ = 231013897 is a prime.

It is a super-2 number, since 2×231030281² = 106749981477877922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231030287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115515140 + 115515141.

It is an arithmetic number, because the mean of its divisors is an integer number (115515141).

Almost surely, 2^231030281 is an apocalyptic number.

It is an amenable number.

231030281 is a deficient number, since it is larger than the sum of its proper divisors (1).

231030281 is an equidigital number, since it uses as much as digits as its factorization.

231030281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 231030281 is about 15199.6802926904. The cubic root of 231030281 is about 613.6060534630.

The spelling of 231030281 in words is "two hundred thirty-one million, thirty thousand, two hundred eighty-one".