21522522330430 has 64 divisors (see below), whose sum is σ = 43044807559680. Its totient is φ = 7682445590400.

The previous prime is 21522522330371. The next prime is 21522522330467. The reversal of 21522522330430 is 3403322522512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4228464 + ... + 7805443.

It is an arithmetic number, because the mean of its divisors is an integer number (672575118120).

Almost surely, 2^{21522522330430} is an apocalyptic number.

21522522330430 is a deficient number, since it is larger than the sum of its proper divisors (21522285229250).

21522522330430 is a wasteful number, since it uses less digits than its factorization.

21522522330430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12034225.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 21522522330430 its reverse (3403322522512), we get a palindrome (24925844852942).

The spelling of 21522522330430 in words is "twenty-one trillion, five hundred twenty-two billion, five hundred twenty-two million, three hundred thirty thousand, four hundred thirty".