2135322521 has 4 divisors (see below), whose sum is σ = 2162352000. Its totient is φ = 2108293044.

The previous prime is 2135322493. The next prime is 2135322523. The reversal of 2135322521 is 1252235312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2135322521 - 2⁶ = 2135322457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2135322523) 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, 13514621 + ... + 13514778.

It is an arithmetic number, because the mean of its divisors is an integer number (540588000).

Almost surely, 2^2135322521 is an apocalyptic number.

It is an amenable number.

2135322521 is a deficient number, since it is larger than the sum of its proper divisors (27029479).

2135322521 is an equidigital number, since it uses as much as digits as its factorization.

2135322521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27029478.

The product of its digits is 3600, while the sum is 26.

The square root of 2135322521 is about 46209.5501060116. The cubic root of 2135322521 is about 1287.7191675911.

Adding to 2135322521 its reverse (1252235312), we get a palindrome (3387557833).

The spelling of 2135322521 in words is "two billion, one hundred thirty-five million, three hundred twenty-two thousand, five hundred twenty-one".