12516243631 has 2 divisors, whose sum is σ = 12516243632. Its totient is φ = 12516243630.

The previous prime is 12516243611. The next prime is 12516243637. The reversal of 12516243631 is 13634261521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12516243631 - 2⁹ = 12516243119 is a prime.

It is a super-2 number, since 2×12516243631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12516243637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258121815 + 6258121816.

It is an arithmetic number, because the mean of its divisors is an integer number (6258121816).

Almost surely, 2^12516243631 is an apocalyptic number.

12516243631 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516243631 is an equidigital number, since it uses as much as digits as its factorization.

12516243631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The spelling of 12516243631 in words is "twelve billion, five hundred sixteen million, two hundred forty-three thousand, six hundred thirty-one".