135131573 has 8 divisors (see below), whose sum is σ = 140931840. Its totient is φ = 129421440.

The previous prime is 135131567. The next prime is 135131611. The reversal of 135131573 is 375131531.

It is a happy number.

135131573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135131573 - 2²² = 130937269 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 (135131273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19463 + ... + 25476.

It is an arithmetic number, because the mean of its divisors is an integer number (17616480).

Almost surely, 2^135131573 is an apocalyptic number.

It is an amenable number.

135131573 is a deficient number, since it is larger than the sum of its proper divisors (5800267).

135131573 is an equidigital number, since it uses as much as digits as its factorization.

135131573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45067.

The product of its digits is 4725, while the sum is 29.

The square root of 135131573 is about 11624.6106601469. The cubic root of 135131573 is about 513.1593866793.

The spelling of 135131573 in words is "one hundred thirty-five million, one hundred thirty-one thousand, five hundred seventy-three".