135023231 has 8 divisors (see below), whose sum is σ = 163389600. Its totient is φ = 108926208.

The previous prime is 135023219. The next prime is 135023237. The reversal of 135023231 is 132320531.

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

It is not a de Polignac number, because 135023231 - 2¹⁰ = 135022207 is a prime.

It is a super-2 number, since 2×135023231² = 36462545819358722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135023237) 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, 567206 + ... + 567443.

It is an arithmetic number, because the mean of its divisors is an integer number (20423700).

Almost surely, 2^135023231 is an apocalyptic number.

135023231 is a deficient number, since it is larger than the sum of its proper divisors (28366369).

135023231 is a wasteful number, since it uses less digits than its factorization.

135023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134673.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 135023231 is about 11619.9496986863. The cubic root of 135023231 is about 513.0222078347.

Adding to 135023231 its reverse (132320531), we get a palindrome (267343762).

The spelling of 135023231 in words is "one hundred thirty-five million, twenty-three thousand, two hundred thirty-one".