135244442531 has 16 divisors (see below), whose sum is σ = 156255762528. Its totient is φ = 115689331200.

The previous prime is 135244442479. The next prime is 135244442563.

135244442531 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 135244442531 - 2²⁶ = 135177333667 is a prime.

It is a super-2 number, since 2×135244442531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135244442831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711941 + ... + 881673.

It is an arithmetic number, because the mean of its divisors is an integer number (9765985158).

Almost surely, 2^135244442531 is an apocalyptic number.

135244442531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135244442531 is a deficient number, since it is larger than the sum of its proper divisors (21011319997).

135244442531 is a wasteful number, since it uses less digits than its factorization.

135244442531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174022.

The product of its digits is 230400, while the sum is 38.

It can be divided in two parts, 135244 and 442531, that added together give a palindrome (577775).

The spelling of 135244442531 in words is "one hundred thirty-five billion, two hundred forty-four million, four hundred forty-two thousand, five hundred thirty-one".