21456522223316 has 48 divisors (see below), whose sum is σ = 38739354605952. Its totient is φ = 10393476508800.

The previous prime is 21456522223277. The next prime is 21456522223319. The reversal of 21456522223316 is 61332222565412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21456522223319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125581706 + ... + 125752446.

It is an arithmetic number, because the mean of its divisors is an integer number (807069887624).

Almost surely, 2^{21456522223316} is an apocalyptic number.

It is an amenable number.

21456522223316 is a deficient number, since it is larger than the sum of its proper divisors (17282832382636).

21456522223316 is a wasteful number, since it uses less digits than its factorization.

21456522223316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178560 (or 178558 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

Adding to 21456522223316 its reverse (61332222565412), we get a palindrome (82788744788728).

The spelling of 21456522223316 in words is "twenty-one trillion, four hundred fifty-six billion, five hundred twenty-two million, two hundred twenty-three thousand, three hundred sixteen".