21455042524223 has 16 divisors (see below), whose sum is σ = 27401562074880. Its totient is φ = 16310453611200.

The previous prime is 21455042524213. The next prime is 21455042524291. The reversal of 21455042524223 is 32242524055412.

It is not a de Polignac number, because 21455042524223 - 2¹⁶ = 21455042458687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455042524213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3398008013 + ... + 3398014326.

It is an arithmetic number, because the mean of its divisors is an integer number (1712597629680).

Almost surely, 2^{21455042524223} is an apocalyptic number.

21455042524223 is a deficient number, since it is larger than the sum of its proper divisors (5946519550657).

21455042524223 is a wasteful number, since it uses less digits than its factorization.

21455042524223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6796022398.

The product of its (nonzero) digits is 768000, while the sum is 41.

Adding to 21455042524223 its reverse (32242524055412), we get a palindrome (53697566579635).

The spelling of 21455042524223 in words is "twenty-one trillion, four hundred fifty-five billion, forty-two million, five hundred twenty-four thousand, two hundred twenty-three".