2135555521 has 32 divisors (see below), whose sum is σ = 2635614720. Its totient is φ = 1705017600.

The previous prime is 2135555519. The next prime is 2135555533. The reversal of 2135555521 is 1255555312.

It is not a de Polignac number, because 2135555521 - 2¹ = 2135555519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2135553521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233566 + ... + 242536.

It is an arithmetic number, because the mean of its divisors is an integer number (82362960).

Almost surely, 2^2135555521 is an apocalyptic number.

It is an amenable number.

2135555521 is a deficient number, since it is larger than the sum of its proper divisors (500059199).

2135555521 is a wasteful number, since it uses less digits than its factorization.

2135555521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9085.

The product of its digits is 37500, while the sum is 34.

The square root of 2135555521 is about 46212.0711611155. The cubic root of 2135555521 is about 1287.7660032409.

The spelling of 2135555521 in words is "two billion, one hundred thirty-five million, five hundred fifty-five thousand, five hundred twenty-one".