63115231 has 2 divisors, whose sum is σ = 63115232. Its totient is φ = 63115230.

The previous prime is 63115211. The next prime is 63115259. The reversal of 63115231 is 13251136.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63115231 - 2¹⁹ = 62590943 is a prime.

It is a super-2 number, since 2×63115231² = 7967064768366722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63115211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31557615 + 31557616.

It is an arithmetic number, because the mean of its divisors is an integer number (31557616).

Almost surely, 2^63115231 is an apocalyptic number.

63115231 is a deficient number, since it is larger than the sum of its proper divisors (1).

63115231 is an equidigital number, since it uses as much as digits as its factorization.

63115231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 63115231 is about 7944.5094876902. The cubic root of 63115231 is about 398.1481713063.

Adding to 63115231 its reverse (13251136), we get a palindrome (76366367).

The spelling of 63115231 in words is "sixty-three million, one hundred fifteen thousand, two hundred thirty-one".