231041287 has 2 divisors, whose sum is σ = 231041288. Its totient is φ = 231041286.

The previous prime is 231041243. The next prime is 231041309. The reversal of 231041287 is 782140132.

231041287 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 is a cyclic number.

It is not a de Polignac number, because 231041287 - 2²³ = 222652679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231041887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115520643 + 115520644.

It is an arithmetic number, because the mean of its divisors is an integer number (115520644).

Almost surely, 2^231041287 is an apocalyptic number.

231041287 is a deficient number, since it is larger than the sum of its proper divisors (1).

231041287 is an equidigital number, since it uses as much as digits as its factorization.

231041287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 231041287 is about 15200.0423354674. The cubic root of 231041287 is about 613.6157971222.

The spelling of 231041287 in words is "two hundred thirty-one million, forty-one thousand, two hundred eighty-seven".