13531140443 has 2 divisors, whose sum is σ = 13531140444. Its totient is φ = 13531140442.

The previous prime is 13531140391. The next prime is 13531140473. The reversal of 13531140443 is 34404113531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13531140443 - 2¹⁴ = 13531124059 is a prime.

It is not a weakly prime, because it can be changed into another prime (13531140473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765570221 + 6765570222.

It is an arithmetic number, because the mean of its divisors is an integer number (6765570222).

Almost surely, 2^13531140443 is an apocalyptic number.

13531140443 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531140443 is an equidigital number, since it uses as much as digits as its factorization.

13531140443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 13531140443 its reverse (34404113531), we get a palindrome (47935253974).

The spelling of 13531140443 in words is "thirteen billion, five hundred thirty-one million, one hundred forty thousand, four hundred forty-three".