135231015 has 32 divisors (see below), whose sum is σ = 220953600. Its totient is φ = 70611840.

The previous prime is 135231013. The next prime is 135231049. The reversal of 135231015 is 510132531.

135231015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135231015 - 2¹ = 135231013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135230982 and 135231000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135231011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164305 + ... + 165125.

It is an arithmetic number, because the mean of its divisors is an integer number (6904800).

Almost surely, 2^135231015 is an apocalyptic number.

135231015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135231015 is a deficient number, since it is larger than the sum of its proper divisors (85722585).

135231015 is a wasteful number, since it uses less digits than its factorization.

135231015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 135231015 is about 11628.8870920652. The cubic root of 135231015 is about 513.2852321358.

Adding to 135231015 its reverse (510132531), we get a palindrome (645363546).

The spelling of 135231015 in words is "one hundred thirty-five million, two hundred thirty-one thousand, fifteen".