135431013 has 4 divisors (see below), whose sum is σ = 180574688. Its totient is φ = 90287340.

The previous prime is 135431003. The next prime is 135431029. The reversal of 135431013 is 310134531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135431013 - 2¹³ = 135422821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135431003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22571833 + ... + 22571838.

It is an arithmetic number, because the mean of its divisors is an integer number (45143672).

Almost surely, 2^135431013 is an apocalyptic number.

It is an amenable number.

135431013 is a deficient number, since it is larger than the sum of its proper divisors (45143675).

135431013 is an equidigital number, since it uses as much as digits as its factorization.

135431013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45143674.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 135431013 is about 11637.4831041768. The cubic root of 135431013 is about 513.5381461441.

Adding to 135431013 its reverse (310134531), we get a palindrome (445565544).

The spelling of 135431013 in words is "one hundred thirty-five million, four hundred thirty-one thousand, thirteen".