646524232231 has 2 divisors, whose sum is σ = 646524232232. Its totient is φ = 646524232230.

The previous prime is 646524232229. The next prime is 646524232253. The reversal of 646524232231 is 132232425646.

646524232231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646524232231 - 2¹ = 646524232229 is a prime.

It is a super-3 number, since 3×646524232231³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 646524232229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646524232331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323262116115 + 323262116116.

It is an arithmetic number, because the mean of its divisors is an integer number (323262116116).

Almost surely, 2^646524232231 is an apocalyptic number.

646524232231 is a deficient number, since it is larger than the sum of its proper divisors (1).

646524232231 is an equidigital number, since it uses as much as digits as its factorization.

646524232231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 40.

Adding to 646524232231 its reverse (132232425646), we get a palindrome (778756657877).

The spelling of 646524232231 in words is "six hundred forty-six billion, five hundred twenty-four million, two hundred thirty-two thousand, two hundred thirty-one".