21552543304331 has 8 divisors (see below), whose sum is σ = 23210482533504. Its totient is φ = 19894611401280.

The previous prime is 21552543304291. The next prime is 21552543304381. The reversal of 21552543304331 is 13340334525512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21552543304331 - 2³⁰ = 21551469562507 is a prime.

It is a super-2 number, since 2×21552543304331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21552543304381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5309855 + ... + 8443911.

It is an arithmetic number, because the mean of its divisors is an integer number (2901310316688).

Almost surely, 2^{21552543304331} is an apocalyptic number.

21552543304331 is a deficient number, since it is larger than the sum of its proper divisors (1657939229173).

21552543304331 is a wasteful number, since it uses less digits than its factorization.

21552543304331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663061.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 21552543304331 its reverse (13340334525512), we get a palindrome (34892877829843).

The spelling of 21552543304331 in words is "twenty-one trillion, five hundred fifty-two billion, five hundred forty-three million, three hundred four thousand, three hundred thirty-one".