135443231 has 8 divisors (see below), whose sum is σ = 168864384. Its totient is φ = 105540120.

The previous prime is 135443227. The next prime is 135443239. The reversal of 135443231 is 132344531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135443231 - 2² = 135443227 is a prime.

It is a super-2 number, since 2×135443231² = 36689737647438722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135443231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135443239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879425 + ... + 879578.

It is an arithmetic number, because the mean of its divisors is an integer number (21108048).

Almost surely, 2^135443231 is an apocalyptic number.

135443231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135443231 is a deficient number, since it is larger than the sum of its proper divisors (33421153).

135443231 is a wasteful number, since it uses less digits than its factorization.

135443231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759021.

The product of its digits is 4320, while the sum is 26.

The square root of 135443231 is about 11638.0080340237. The cubic root of 135443231 is about 513.5535887429.

Adding to 135443231 its reverse (132344531), we get a palindrome (267787762).

The spelling of 135443231 in words is "one hundred thirty-five million, four hundred forty-three thousand, two hundred thirty-one".