231448331 has 2 divisors, whose sum is σ = 231448332. Its totient is φ = 231448330.

The previous prime is 231448309. The next prime is 231448339. The reversal of 231448331 is 133844132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231448331 - 2²⁶ = 164339467 is a prime.

It is a super-2 number, since 2×231448331² = 107136659845371122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 231448294 and 231448303.

It is not a weakly prime, because it can be changed into another prime (231448339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115724165 + 115724166.

It is an arithmetic number, because the mean of its divisors is an integer number (115724166).

Almost surely, 2^231448331 is an apocalyptic number.

231448331 is a deficient number, since it is larger than the sum of its proper divisors (1).

231448331 is an equidigital number, since it uses as much as digits as its factorization.

231448331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 231448331 is about 15213.4260112573. The cubic root of 231448331 is about 613.9759377938.

The spelling of 231448331 in words is "two hundred thirty-one million, four hundred forty-eight thousand, three hundred thirty-one".