21552113235 has 16 divisors (see below), whose sum is σ = 34485810336. Its totient is φ = 11493650688.

The previous prime is 21552113221. The next prime is 21552113257. The reversal of 21552113235 is 53231125512.

It is not a de Polignac number, because 21552113235 - 2¹¹ = 21552111187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214087 + ... + 298223.

It is an arithmetic number, because the mean of its divisors is an integer number (2155363146).

Almost surely, 2^21552113235 is an apocalyptic number.

21552113235 is a deficient number, since it is larger than the sum of its proper divisors (12933697101).

21552113235 is a wasteful number, since it uses less digits than its factorization.

21552113235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101222.

The product of its digits is 9000, while the sum is 30.

Adding to 21552113235 its reverse (53231125512), we get a palindrome (74783238747).

The spelling of 21552113235 in words is "twenty-one billion, five hundred fifty-two million, one hundred thirteen thousand, two hundred thirty-five".