63220423631 has 2 divisors, whose sum is σ = 63220423632. Its totient is φ = 63220423630.

The previous prime is 63220423627. The next prime is 63220423687. The reversal of 63220423631 is 13632402236.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63220423631 - 2² = 63220423627 is a prime.

It is a super-3 number, since 3×63220423631³ (a number of 33 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 (63220423831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31610211815 + 31610211816.

It is an arithmetic number, because the mean of its divisors is an integer number (31610211816).

Almost surely, 2^63220423631 is an apocalyptic number.

63220423631 is a deficient number, since it is larger than the sum of its proper divisors (1).

63220423631 is an equidigital number, since it uses as much as digits as its factorization.

63220423631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 63220423631 its reverse (13632402236), we get a palindrome (76852825867).

The spelling of 63220423631 in words is "sixty-three billion, two hundred twenty million, four hundred twenty-three thousand, six hundred thirty-one".