135444531 has 16 divisors (see below), whose sum is σ = 186305184. Its totient is φ = 87462144.

The previous prime is 135444523. The next prime is 135444557.

135444531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 135444531 - 2³ = 135444523 is a prime.

It is a super-2 number, since 2×135444531² = 36690441955619922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135444511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23245 + ... + 28481.

It is an arithmetic number, because the mean of its divisors is an integer number (11644074).

Almost surely, 2^135444531 is an apocalyptic number.

135444531 is a deficient number, since it is larger than the sum of its proper divisors (50860653).

135444531 is a wasteful number, since it uses less digits than its factorization.

135444531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510.

The product of its digits is 14400, while the sum is 30.

The square root of 135444531 is about 11638.0638853720. The cubic root of 135444531 is about 513.5552317868. Note that the first 3 decimals are identical.

The spelling of 135444531 in words is "one hundred thirty-five million, four hundred forty-four thousand, five hundred thirty-one".