115531631443 has 2 divisors, whose sum is σ = 115531631444. Its totient is φ = 115531631442.

The previous prime is 115531631387. The next prime is 115531631507. The reversal of 115531631443 is 344136135511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115531631443 - 2²⁵ = 115498077011 is a prime.

It is not a weakly prime, because it can be changed into another prime (115531631543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57765815721 + 57765815722.

It is an arithmetic number, because the mean of its divisors is an integer number (57765815722).

Almost surely, 2^115531631443 is an apocalyptic number.

115531631443 is a deficient number, since it is larger than the sum of its proper divisors (1).

115531631443 is an equidigital number, since it uses as much as digits as its factorization.

115531631443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

Adding to 115531631443 its reverse (344136135511), we get a palindrome (459667766954).

The spelling of 115531631443 in words is "one hundred fifteen billion, five hundred thirty-one million, six hundred thirty-one thousand, four hundred forty-three".