21922905164159 has 4 divisors (see below), whose sum is σ = 21983971752720. Its totient is φ = 21861838575600.

The previous prime is 21922905164101. The next prime is 21922905164179. The reversal of 21922905164159 is 95146150922912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21922905164159 - 2²⁸ = 21922636728703 is a prime.

It is a super-2 number, since 2×21922905164159² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922905164179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30533293742 + ... + 30533294459.

It is an arithmetic number, because the mean of its divisors is an integer number (5495992938180).

Almost surely, 2^{21922905164159} is an apocalyptic number.

21922905164159 is a deficient number, since it is larger than the sum of its proper divisors (61066588561).

21922905164159 is an equidigital number, since it uses as much as digits as its factorization.

21922905164159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61066588560.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 21922905164159 in words is "twenty-one trillion, nine hundred twenty-two billion, nine hundred five million, one hundred sixty-four thousand, one hundred fifty-nine".