135231012 has 48 divisors (see below), whose sum is σ = 400686720. Its totient is φ = 38637216.

The previous prime is 135231011. The next prime is 135231013. The reversal of 135231012 is 210132531.

135231012 is a `hidden beast` number, since 1 + 352 + 310 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (135231011) and next prime (135231013).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 15 ways as a sum of consecutive naturals, for example, 88683 + ... + 90194.

It is an arithmetic number, because the mean of its divisors is an integer number (8347640).

Almost surely, 2^135231012 is an apocalyptic number.

135231012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135231012 is an abundant number, since it is smaller than the sum of its proper divisors (265455708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135231012 is a wasteful number, since it uses less digits than its factorization.

135231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178897 (or 178889 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 135231012 is about 11628.8869630760. The cubic root of 135231012 is about 513.2852283401.

Adding to 135231012 its reverse (210132531), we get a palindrome (345363543).

It can be divided in two parts, 13523 and 1012, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 135231012 in words is "one hundred thirty-five million, two hundred thirty-one thousand, twelve".