21522014226 has 32 divisors (see below), whose sum is σ = 47876273280. Its totient is φ = 7166568528.

The previous prime is 21522014219. The next prime is 21522014243. The reversal of 21522014226 is 62241022512.

21522014226 is a `hidden beast` number, since 2 + 15 + 220 + 1 + 422 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21522014226.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153861 + ... + 258296.

It is an arithmetic number, because the mean of its divisors is an integer number (1496133540).

Almost surely, 2^21522014226 is an apocalyptic number.

21522014226 is an abundant number, since it is smaller than the sum of its proper divisors (26354259054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21522014226 is a wasteful number, since it uses less digits than its factorization.

21522014226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413135 (or 413129 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21522014226 its reverse (62241022512), we get a palindrome (83763036738).

The spelling of 21522014226 in words is "twenty-one billion, five hundred twenty-two million, fourteen thousand, two hundred twenty-six".