231243151 has 2 divisors, whose sum is σ = 231243152. Its totient is φ = 231243150.

The previous prime is 231243139. The next prime is 231243169. The reversal of 231243151 is 151342132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231243151 - 2²¹ = 229145999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231246151) 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, 115621575 + 115621576.

It is an arithmetic number, because the mean of its divisors is an integer number (115621576).

Almost surely, 2^231243151 is an apocalyptic number.

231243151 is a deficient number, since it is larger than the sum of its proper divisors (1).

231243151 is an equidigital number, since it uses as much as digits as its factorization.

231243151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 231243151 is about 15206.6811303453. The cubic root of 231243151 is about 613.7944533322.

Adding to 231243151 its reverse (151342132), we get a palindrome (382585283).

The spelling of 231243151 in words is "two hundred thirty-one million, two hundred forty-three thousand, one hundred fifty-one".