231643351 has 2 divisors, whose sum is σ = 231643352. Its totient is φ = 231643350.

The previous prime is 231643339. The next prime is 231643403. The reversal of 231643351 is 153346132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231643351 - 2⁵ = 231643319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231643331) 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, 115821675 + 115821676.

It is an arithmetic number, because the mean of its divisors is an integer number (115821676).

Almost surely, 2^231643351 is an apocalyptic number.

231643351 is a deficient number, since it is larger than the sum of its proper divisors (1).

231643351 is an equidigital number, since it uses as much as digits as its factorization.

231643351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 231643351 is about 15219.8341318163. The cubic root of 231643351 is about 614.1483362034.

Adding to 231643351 its reverse (153346132), we get a palindrome (384989483).

It can be divided in two parts, 2316433 and 51, that added together give a square (2316484 = 1522²).

The spelling of 231643351 in words is "two hundred thirty-one million, six hundred forty-three thousand, three hundred fifty-one".