21522505411 has 8 divisors (see below), whose sum is σ = 24288721200. Its totient is φ = 18891227040.

The previous prime is 21522505397. The next prime is 21522505421. The reversal of 21522505411 is 11450522512.

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 21522505411 - 2¹¹ = 21522503363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21522505411.

It is not an unprimeable number, because it can be changed into a prime (21522505421) 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, 33734016 + ... + 33734653.

It is an arithmetic number, because the mean of its divisors is an integer number (3036090150).

Almost surely, 2^21522505411 is an apocalyptic number.

21522505411 is a deficient number, since it is larger than the sum of its proper divisors (2766215789).

21522505411 is a wasteful number, since it uses less digits than its factorization.

21522505411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67468709.

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 21522505411 in words is "twenty-one billion, five hundred twenty-two million, five hundred five thousand, four hundred eleven".