63623257331 has 2 divisors, whose sum is σ = 63623257332. Its totient is φ = 63623257330.

The previous prime is 63623257297. The next prime is 63623257361. The reversal of 63623257331 is 13375232636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63623257331 is a prime.

It is a super-2 number, since 2×63623257331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63623257361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31811628665 + 31811628666.

It is an arithmetic number, because the mean of its divisors is an integer number (31811628666).

Almost surely, 2^63623257331 is an apocalyptic number.

63623257331 is a deficient number, since it is larger than the sum of its proper divisors (1).

63623257331 is an equidigital number, since it uses as much as digits as its factorization.

63623257331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 41.

Adding to 63623257331 its reverse (13375232636), we get a palindrome (76998489967).

The spelling of 63623257331 in words is "sixty-three billion, six hundred twenty-three million, two hundred fifty-seven thousand, three hundred thirty-one".