135323233521 has 16 divisors (see below), whose sum is σ = 210097528704. Its totient is φ = 75868550784.

The previous prime is 135323233501. The next prime is 135323233537. The reversal of 135323233521 is 125332323531.

It is a happy number.

It is not a de Polignac number, because 135323233521 - 2²¹ = 135321136369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135323233501) 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, 60790996 + ... + 60793221.

It is an arithmetic number, because the mean of its divisors is an integer number (13131095544).

Almost surely, 2^135323233521 is an apocalyptic number.

It is an amenable number.

135323233521 is a deficient number, since it is larger than the sum of its proper divisors (74774295183).

135323233521 is a wasteful number, since it uses less digits than its factorization.

135323233521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121584280.

The product of its digits is 48600, while the sum is 33.

The spelling of 135323233521 in words is "one hundred thirty-five billion, three hundred twenty-three million, two hundred thirty-three thousand, five hundred twenty-one".