12443356531 has 2 divisors, whose sum is σ = 12443356532. Its totient is φ = 12443356530.

The previous prime is 12443356529. The next prime is 12443356571. The reversal of 12443356531 is 13565334421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12443356531 - 2¹ = 12443356529 is a prime.

It is a super-2 number, since 2×12443356531² (a number of 21 digits) contains 22 as substring.

Together with 12443356529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12443356571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221678265 + 6221678266.

It is an arithmetic number, because the mean of its divisors is an integer number (6221678266).

Almost surely, 2^12443356531 is an apocalyptic number.

12443356531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443356531 is an equidigital number, since it uses as much as digits as its factorization.

12443356531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 37.

The spelling of 12443356531 in words is "twelve billion, four hundred forty-three million, three hundred fifty-six thousand, five hundred thirty-one".