22135173521 has 8 divisors (see below), whose sum is σ = 23287896744. Its totient is φ = 21011633280.

The previous prime is 22135173509. The next prime is 22135173523. The reversal of 22135173521 is 12537153122.

It can be written as a sum of positive squares in 4 ways, for example, as 4387605121 + 17747568400 = 66239^2 + 133220^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22135173521 - 2⁶ = 22135173457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22135173523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7294190 + ... + 7297223.

It is an arithmetic number, because the mean of its divisors is an integer number (2910987093).

Almost surely, 2^22135173521 is an apocalyptic number.

It is an amenable number.

22135173521 is a deficient number, since it is larger than the sum of its proper divisors (1152723223).

22135173521 is a wasteful number, since it uses less digits than its factorization.

22135173521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14591491.

The product of its digits is 12600, while the sum is 32.

The spelling of 22135173521 in words is "twenty-two billion, one hundred thirty-five million, one hundred seventy-three thousand, five hundred twenty-one".