135242444242531 has 4 divisors (see below), whose sum is σ = 136506392319672. Its totient is φ = 133978496165392.

The previous prime is 135242444242469. The next prime is 135242444242559.

135242444242531 is nontrivially palindromic in base 10.

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 135242444242531 - 2⁹ = 135242444242019 is a prime.

It is a super-2 number, since 2×135242444242531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135242444242331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631974038410 + ... + 631974038623.

It is an arithmetic number, because the mean of its divisors is an integer number (34126598079918).

Almost surely, 2^{135242444242531} is an apocalyptic number.

135242444242531 is a deficient number, since it is larger than the sum of its proper divisors (1263948077141).

135242444242531 is a wasteful number, since it uses less digits than its factorization.

135242444242531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263948077140.

The product of its digits is 3686400, while the sum is 46.

The spelling of 135242444242531 in words is "one hundred thirty-five trillion, two hundred forty-two billion, four hundred forty-four million, two hundred forty-two thousand, five hundred thirty-one".