63318131231 has 2 divisors, whose sum is σ = 63318131232. Its totient is φ = 63318131230.

The previous prime is 63318131209. The next prime is 63318131281. The reversal of 63318131231 is 13213181336.

63318131231 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 63318131231 - 2¹⁰ = 63318130207 is a prime.

It is a super-2 number, since 2×63318131231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63318131281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31659065615 + 31659065616.

It is an arithmetic number, because the mean of its divisors is an integer number (31659065616).

Almost surely, 2^63318131231 is an apocalyptic number.

63318131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

63318131231 is an equidigital number, since it uses as much as digits as its factorization.

63318131231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The spelling of 63318131231 in words is "sixty-three billion, three hundred eighteen million, one hundred thirty-one thousand, two hundred thirty-one".