12513445531 has 2 divisors, whose sum is σ = 12513445532. Its totient is φ = 12513445530.

The previous prime is 12513445517. The next prime is 12513445537. The reversal of 12513445531 is 13554431521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12513445531 - 2⁹ = 12513445019 is a prime.

It is a super-2 number, since 2×12513445531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12513445537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256722765 + 6256722766.

It is an arithmetic number, because the mean of its divisors is an integer number (6256722766).

Almost surely, 2^12513445531 is an apocalyptic number.

12513445531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513445531 is an equidigital number, since it uses as much as digits as its factorization.

12513445531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 34.

The spelling of 12513445531 in words is "twelve billion, five hundred thirteen million, four hundred forty-five thousand, five hundred thirty-one".