135215354243 has 2 divisors, whose sum is σ = 135215354244. Its totient is φ = 135215354242.

The previous prime is 135215354207. The next prime is 135215354321. The reversal of 135215354243 is 342453512531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135215354243 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 135215354197 and 135215354206.

It is not a weakly prime, because it can be changed into another prime (135215359243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67607677121 + 67607677122.

It is an arithmetic number, because the mean of its divisors is an integer number (67607677122).

Almost surely, 2^135215354243 is an apocalyptic number.

135215354243 is a deficient number, since it is larger than the sum of its proper divisors (1).

135215354243 is an equidigital number, since it uses as much as digits as its factorization.

135215354243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 38.

Adding to 135215354243 its reverse (342453512531), we get a palindrome (477668866774).

The spelling of 135215354243 in words is "one hundred thirty-five billion, two hundred fifteen million, three hundred fifty-four thousand, two hundred forty-three".