63213131231 has 2 divisors, whose sum is σ = 63213131232. Its totient is φ = 63213131230.

The previous prime is 63213131221. The next prime is 63213131243. The reversal of 63213131231 is 13213131236.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63213131231 - 2³⁰ = 62139389407 is a prime.

It is a super-2 number, since 2×63213131231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63213131231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63213131221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31606565615 + 31606565616.

It is an arithmetic number, because the mean of its divisors is an integer number (31606565616).

Almost surely, 2^63213131231 is an apocalyptic number.

63213131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

63213131231 is an equidigital number, since it uses as much as digits as its factorization.

63213131231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

Adding to 63213131231 its reverse (13213131236), we get a palindrome (76426262467).

The spelling of 63213131231 in words is "sixty-three billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred thirty-one".