135431515211 has 4 divisors (see below), whose sum is σ = 135864204072. Its totient is φ = 134998826352.

The previous prime is 135431515199. The next prime is 135431515217. The reversal of 135431515211 is 112515134531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135431515211 - 2⁶ = 135431515147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135431515217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216343961 + ... + 216344586.

It is an arithmetic number, because the mean of its divisors is an integer number (33966051018).

Almost surely, 2^135431515211 is an apocalyptic number.

135431515211 is a deficient number, since it is larger than the sum of its proper divisors (432688861).

135431515211 is an equidigital number, since it uses as much as digits as its factorization.

135431515211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432688860.

The product of its digits is 9000, while the sum is 32.

Adding to 135431515211 its reverse (112515134531), we get a palindrome (247946649742).

The spelling of 135431515211 in words is "one hundred thirty-five billion, four hundred thirty-one million, five hundred fifteen thousand, two hundred eleven".