21543042255335 has 8 divisors (see below), whose sum is σ = 25881128078496. Its totient is φ = 17214782222880.

The previous prime is 21543042255227. The next prime is 21543042255337. The reversal of 21543042255335 is 53355224034512.

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

It is not a de Polignac number, because 21543042255335 - 2¹² = 21543042251239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21543042255337) 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, 2456442851 + ... + 2456451620.

It is an arithmetic number, because the mean of its divisors is an integer number (3235141009812).

Almost surely, 2^{21543042255335} is an apocalyptic number.

21543042255335 is a deficient number, since it is larger than the sum of its proper divisors (4338085823161).

21543042255335 is an equidigital number, since it uses as much as digits as its factorization.

21543042255335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912895353.

The product of its (nonzero) digits is 2160000, while the sum is 44.

Adding to 21543042255335 its reverse (53355224034512), we get a palindrome (74898266289847).

The spelling of 21543042255335 in words is "twenty-one trillion, five hundred forty-three billion, forty-two million, two hundred fifty-five thousand, three hundred thirty-five".