135515522 has 4 divisors (see below), whose sum is σ = 203273286. Its totient is φ = 67757760.

The previous prime is 135515503. The next prime is 135515531. The reversal of 135515522 is 225515531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 134351281 + 1164241 = 11591^2 + 1079^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33878879 + ... + 33878882.

Almost surely, 2^135515522 is an apocalyptic number.

135515522 is a deficient number, since it is larger than the sum of its proper divisors (67757764).

135515522 is an equidigital number, since it uses as much as digits as its factorization.

135515522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67757763.

The product of its digits is 7500, while the sum is 29.

The square root of 135515522 is about 11641.1134347192. The cubic root of 135515522 is about 513.6449399290.

Subtracting 135515522 from its reverse (225515531), we obtain a palindrome (90000009).

The spelling of 135515522 in words is "one hundred thirty-five million, five hundred fifteen thousand, five hundred twenty-two".