21552524245543 has 8 divisors (see below), whose sum is σ = 21566710604720. Its totient is φ = 21538342488960.

The previous prime is 21552524245529. The next prime is 21552524245579. The reversal of 21552524245543 is 34554242525512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21552524245543 is a prime.

It is a super-2 number, since 2×21552524245543² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552524945543) 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, 8243023 + ... + 10538143.

It is an arithmetic number, because the mean of its divisors is an integer number (2695838825590).

Almost surely, 2^{21552524245543} is an apocalyptic number.

21552524245543 is a deficient number, since it is larger than the sum of its proper divisors (14186359177).

21552524245543 is a wasteful number, since it uses less digits than its factorization.

21552524245543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301297.

The product of its digits is 9600000, while the sum is 49.

The spelling of 21552524245543 in words is "twenty-one trillion, five hundred fifty-two billion, five hundred twenty-four million, two hundred forty-five thousand, five hundred forty-three".