21533341214255 has 8 divisors (see below), whose sum is σ = 27827702492352. Its totient is φ = 15901544281248.

The previous prime is 21533341214251. The next prime is 21533341214257. The reversal of 21533341214255 is 55241214333512.

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 21533341214255 - 2² = 21533341214251 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 (21533341214251) 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, 165641086199 + ... + 165641086328.

It is an arithmetic number, because the mean of its divisors is an integer number (3478462811544).

Almost surely, 2^{21533341214255} is an apocalyptic number.

21533341214255 is a deficient number, since it is larger than the sum of its proper divisors (6294361278097).

21533341214255 is a wasteful number, since it uses less digits than its factorization.

21533341214255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331282172545.

The product of its digits is 432000, while the sum is 41.

Adding to 21533341214255 its reverse (55241214333512), we get a palindrome (76774555547767).

The spelling of 21533341214255 in words is "twenty-one trillion, five hundred thirty-three billion, three hundred forty-one million, two hundred fourteen thousand, two hundred fifty-five".