135000231 has 4 divisors (see below), whose sum is σ = 180000312. Its totient is φ = 90000152.

The previous prime is 135000199. The next prime is 135000233. The reversal of 135000231 is 132000531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135000231 - 2⁵ = 135000199 is a prime.

It is a super-2 number, since 2×135000231² = 36450124740106722, which contains 22 as substring.

135000231 is a modest number, since divided by 231 gives 135 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 135000231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135000233) 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, 22500036 + ... + 22500041.

It is an arithmetic number, because the mean of its divisors is an integer number (45000078).

Almost surely, 2^135000231 is an apocalyptic number.

135000231 is a deficient number, since it is larger than the sum of its proper divisors (45000081).

135000231 is an equidigital number, since it uses as much as digits as its factorization.

135000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000080.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 135000231 is about 11618.9599792753. The cubic root of 135000231 is about 512.9930765987.

Adding to 135000231 its reverse (132000531), we get a palindrome (267000762).

The spelling of 135000231 in words is "one hundred thirty-five million, two hundred thirty-one", and thus it is an aban number.