105631421263 has 2 divisors, whose sum is σ = 105631421264. Its totient is φ = 105631421262.

The previous prime is 105631421251. The next prime is 105631421279. The reversal of 105631421263 is 362124136501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105631421263 - 2¹³ = 105631413071 is a prime.

It is a super-3 number, since 3×105631421263³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105631421213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52815710631 + 52815710632.

It is an arithmetic number, because the mean of its divisors is an integer number (52815710632).

Almost surely, 2^105631421263 is an apocalyptic number.

105631421263 is a deficient number, since it is larger than the sum of its proper divisors (1).

105631421263 is an equidigital number, since it uses as much as digits as its factorization.

105631421263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 105631421263 its reverse (362124136501), we get a palindrome (467755557764).

The spelling of 105631421263 in words is "one hundred five billion, six hundred thirty-one million, four hundred twenty-one thousand, two hundred sixty-three".