21524255113 has 8 divisors (see below), whose sum is σ = 22257695808. Its totient is φ = 20802937584.

The previous prime is 21524255099. The next prime is 21524255177. The reversal of 21524255113 is 31155242512.

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-21524255113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21524250113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3027181 + ... + 3034282.

It is an arithmetic number, because the mean of its divisors is an integer number (2782211976).

Almost surely, 2^21524255113 is an apocalyptic number.

It is an amenable number.

21524255113 is a deficient number, since it is larger than the sum of its proper divisors (733440695).

21524255113 is an equidigital number, since it uses as much as digits as its factorization.

21524255113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061583.

The product of its digits is 12000, while the sum is 31.

Adding to 21524255113 its reverse (31155242512), we get a palindrome (52679497625).

The spelling of 21524255113 in words is "twenty-one billion, five hundred twenty-four million, two hundred fifty-five thousand, one hundred thirteen".