135315571 has 4 divisors (see below), whose sum is σ = 135742752. Its totient is φ = 134888392.

The previous prime is 135315569. The next prime is 135315577. The reversal of 135315571 is 175513531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175513531 = 61 ⋅2877271.

It is a cyclic number.

It is not a de Polignac number, because 135315571 - 2¹ = 135315569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135315577) 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, 213115 + ... + 213748.

It is an arithmetic number, because the mean of its divisors is an integer number (33935688).

Almost surely, 2^135315571 is an apocalyptic number.

135315571 is a deficient number, since it is larger than the sum of its proper divisors (427181).

135315571 is an equidigital number, since it uses as much as digits as its factorization.

135315571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427180.

The product of its digits is 7875, while the sum is 31.

The square root of 135315571 is about 11632.5221254894. The cubic root of 135315571 is about 513.3921905958.

The spelling of 135315571 in words is "one hundred thirty-five million, three hundred fifteen thousand, five hundred seventy-one".