135032231 has 4 divisors (see below), whose sum is σ = 135055632. Its totient is φ = 135008832.

The previous prime is 135032213. The next prime is 135032243. The reversal of 135032231 is 132230531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 135032231 - 2⁶ = 135032167 is a prime.

It is a super-2 number, since 2×135032231² = 36467406817674722, 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 (135032201) 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 3 ways as a sum of consecutive naturals, for example, 3806 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (33763908).

Almost surely, 2^135032231 is an apocalyptic number.

135032231 is a deficient number, since it is larger than the sum of its proper divisors (23401).

135032231 is a wasteful number, since it uses less digits than its factorization.

135032231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23400.

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

The square root of 135032231 is about 11620.3369572487. The cubic root of 135032231 is about 513.0336061135.

Adding to 135032231 its reverse (132230531), we get a palindrome (267262762).

The spelling of 135032231 in words is "one hundred thirty-five million, thirty-two thousand, two hundred thirty-one".