231296281 has 2 divisors, whose sum is σ = 231296282. Its totient is φ = 231296280.

The previous prime is 231296207. The next prime is 231296309. The reversal of 231296281 is 182692132.

231296281 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., 134096400 + 97199881 = 11580^2 + 9859^2 .

It is a cyclic number.

It is not a de Polignac number, because 231296281 - 2¹³ = 231288089 is a prime.

It is a super-2 number, since 2×231296281² = 106995939208861922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231296881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115648140 + 115648141.

It is an arithmetic number, because the mean of its divisors is an integer number (115648141).

Almost surely, 2^231296281 is an apocalyptic number.

It is an amenable number.

231296281 is a deficient number, since it is larger than the sum of its proper divisors (1).

231296281 is an equidigital number, since it uses as much as digits as its factorization.

231296281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 231296281 is about 15208.4279595230. The cubic root of 231296281 is about 613.8414578264.

The spelling of 231296281 in words is "two hundred thirty-one million, two hundred ninety-six thousand, two hundred eighty-one".