21226323175 has 6 divisors (see below), whose sum is σ = 26320640768. Its totient is φ = 16981058520.

The previous prime is 21226323161. The next prime is 21226323197. The reversal of 21226323175 is 57132362212.

It is not a de Polignac number, because 21226323175 - 2¹⁷ = 21226192103 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 21226323175.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 424526439 + ... + 424526488.

Almost surely, 2^21226323175 is an apocalyptic number.

21226323175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21226323175 is a deficient number, since it is larger than the sum of its proper divisors (5094317593).

21226323175 is an equidigital number, since it uses as much as digits as its factorization.

21226323175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849052937 (or 849052932 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

Adding to 21226323175 its reverse (57132362212), we get a palindrome (78358685387).

The spelling of 21226323175 in words is "twenty-one billion, two hundred twenty-six million, three hundred twenty-three thousand, one hundred seventy-five".