63271631 has 2 divisors, whose sum is σ = 63271632. Its totient is φ = 63271630.

The previous prime is 63271583. The next prime is 63271639. The reversal of 63271631 is 13617236.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63271631 - 2¹⁸ = 63009487 is a prime.

It is a super-2 number, since 2×63271631² = 8006598578800322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63271594 and 63271603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63271639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31635815 + 31635816.

It is an arithmetic number, because the mean of its divisors is an integer number (31635816).

Almost surely, 2^63271631 is an apocalyptic number.

63271631 is a deficient number, since it is larger than the sum of its proper divisors (1).

63271631 is an equidigital number, since it uses as much as digits as its factorization.

63271631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 63271631 is about 7954.3466733604. The cubic root of 63271631 is about 398.4767713828.

Adding to 63271631 its reverse (13617236), we get a palindrome (76888867).

The spelling of 63271631 in words is "sixty-three million, two hundred seventy-one thousand, six hundred thirty-one".