135252431 has 16 divisors (see below), whose sum is σ = 145541760. Its totient is φ = 125310240.

The previous prime is 135252413. The next prime is 135252437. The reversal of 135252431 is 134252531.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135252431 is a prime.

It is a super-2 number, since 2×135252431² = 36586440182819522, 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 135252431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135252437) 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, 230120 + ... + 230706.

It is an arithmetic number, because the mean of its divisors is an integer number (9096360).

Almost surely, 2^135252431 is an apocalyptic number.

135252431 is a deficient number, since it is larger than the sum of its proper divisors (10289329).

135252431 is a wasteful number, since it uses less digits than its factorization.

135252431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854.

The product of its digits is 3600, while the sum is 26.

The square root of 135252431 is about 11629.8078659968. The cubic root of 135252431 is about 513.3123263550.

The spelling of 135252431 in words is "one hundred thirty-five million, two hundred fifty-two thousand, four hundred thirty-one".