135231512142 has 16 divisors (see below), whose sum is σ = 270472775760. Its totient is φ = 45075545472.

The previous prime is 135231512131. The next prime is 135231512179. The reversal of 135231512142 is 241215132531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219417 + ... + 564452.

It is an arithmetic number, because the mean of its divisors is an integer number (16904548485).

Almost surely, 2^135231512142 is an apocalyptic number.

135231512142 is an abundant number, since it is smaller than the sum of its proper divisors (135241263618).

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

135231512142 is a wasteful number, since it uses less digits than its factorization.

135231512142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812627.

The product of its digits is 7200, while the sum is 30.

Adding to 135231512142 its reverse (241215132531), we get a palindrome (376446644673).

The spelling of 135231512142 in words is "one hundred thirty-five billion, two hundred thirty-one million, five hundred twelve thousand, one hundred forty-two".