231220267 has 2 divisors, whose sum is σ = 231220268. Its totient is φ = 231220266.

The previous prime is 231220237. The next prime is 231220303. The reversal of 231220267 is 762022132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231220267 is a prime.

It is not a weakly prime, because it can be changed into another prime (231220217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610133 + 115610134.

It is an arithmetic number, because the mean of its divisors is an integer number (115610134).

Almost surely, 2^231220267 is an apocalyptic number.

231220267 is a deficient number, since it is larger than the sum of its proper divisors (1).

231220267 is an equidigital number, since it uses as much as digits as its factorization.

231220267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 231220267 is about 15205.9286793014. The cubic root of 231220267 is about 613.7742054739.

Adding to 231220267 its reverse (762022132), we get a palindrome (993242399).

The spelling of 231220267 in words is "two hundred thirty-one million, two hundred twenty thousand, two hundred sixty-seven".