231887351 has 2 divisors, whose sum is σ = 231887352. Its totient is φ = 231887350.

The previous prime is 231887339. The next prime is 231887353. The reversal of 231887351 is 153788132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231887351 is a prime.

Together with 231887353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231887353) 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, 115943675 + 115943676.

It is an arithmetic number, because the mean of its divisors is an integer number (115943676).

Almost surely, 2^231887351 is an apocalyptic number.

231887351 is a deficient number, since it is larger than the sum of its proper divisors (1).

231887351 is an equidigital number, since it uses as much as digits as its factorization.

231887351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 231887351 is about 15227.8478781475. The cubic root of 231887351 is about 614.3638969047.

The spelling of 231887351 in words is "two hundred thirty-one million, eight hundred eighty-seven thousand, three hundred fifty-one".