21552551333275 has 24 divisors (see below), whose sum is σ = 27189968815440. Its totient is φ = 16942421314560.

The previous prime is 21552551333251. The next prime is 21552551333281. The reversal of 21552551333275 is 57233315525512.

It is not a de Polignac number, because 21552551333275 - 2²⁵ = 21552517778843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207427 + ... + 6568723.

It is an arithmetic number, because the mean of its divisors is an integer number (1132915367310).

Almost surely, 2^{21552551333275} is an apocalyptic number.

21552551333275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21552551333275 is a deficient number, since it is larger than the sum of its proper divisors (5637417482165).

21552551333275 is a wasteful number, since it uses less digits than its factorization.

21552551333275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363663 (or 6363658 counting only the distinct ones).

The product of its digits is 4725000, while the sum is 49.

Adding to 21552551333275 its reverse (57233315525512), we get a palindrome (78785866858787).

The spelling of 21552551333275 in words is "twenty-one trillion, five hundred fifty-two billion, five hundred fifty-one million, three hundred thirty-three thousand, two hundred seventy-five".