135043231 has 2 divisors, whose sum is σ = 135043232. Its totient is φ = 135043230.

The previous prime is 135043219. The next prime is 135043247. The reversal of 135043231 is 132340531.

It is a weak prime.

It is an emirp because it is prime and its reverse (132340531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135043231 - 2⁵ = 135043199 is a prime.

It is a super-2 number, since 2×135043231² = 36473348477838722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135043201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67521615 + 67521616.

It is an arithmetic number, because the mean of its divisors is an integer number (67521616).

Almost surely, 2^135043231 is an apocalyptic number.

135043231 is a deficient number, since it is larger than the sum of its proper divisors (1).

135043231 is an equidigital number, since it uses as much as digits as its factorization.

135043231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 135043231 is about 11620.8102557438. The cubic root of 135043231 is about 513.0475366554.

Adding to 135043231 its reverse (132340531), we get a palindrome (267383762).

The spelling of 135043231 in words is "one hundred thirty-five million, forty-three thousand, two hundred thirty-one".