231281263 has 2 divisors, whose sum is σ = 231281264. Its totient is φ = 231281262.

The previous prime is 231281233. The next prime is 231281279. The reversal of 231281263 is 362182132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231281263 - 2⁵ = 231281231 is a prime.

It is a super-2 number, since 2×231281263² = 106982045229750338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231281233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115640631 + 115640632.

It is an arithmetic number, because the mean of its divisors is an integer number (115640632).

Almost surely, 2^231281263 is an apocalyptic number.

231281263 is a deficient number, since it is larger than the sum of its proper divisors (1).

231281263 is an equidigital number, since it uses as much as digits as its factorization.

231281263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 231281263 is about 15207.9342121144. The cubic root of 231281263 is about 613.8281720233.

The spelling of 231281263 in words is "two hundred thirty-one million, two hundred eighty-one thousand, two hundred sixty-three".