135144431 has 4 divisors (see below), whose sum is σ = 136855200. Its totient is φ = 133433664.

The previous prime is 135144419. The next prime is 135144433. The reversal of 135144431 is 134441531.

It is a happy number.

135144431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 135144431 - 2⁶ = 135144367 is a prime.

It is a super-2 number, since 2×135144431² = 36528034460627522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135144431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135144433) 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, 855266 + ... + 855423.

It is an arithmetic number, because the mean of its divisors is an integer number (34213800).

Almost surely, 2^135144431 is an apocalyptic number.

135144431 is a deficient number, since it is larger than the sum of its proper divisors (1710769).

135144431 is an equidigital number, since it uses as much as digits as its factorization.

135144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710768.

The product of its digits is 2880, while the sum is 26.

The square root of 135144431 is about 11625.1636977722. The cubic root of 135144431 is about 513.1756621605.

Adding to 135144431 its reverse (134441531), we get a palindrome (269585962).

The spelling of 135144431 in words is "one hundred thirty-five million, one hundred forty-four thousand, four hundred thirty-one".