22242165462521 has 4 divisors (see below), whose sum is σ = 22492077434100. Its totient is φ = 21992253490944.

The previous prime is 22242165462511. The next prime is 22242165462547. The reversal of 22242165462521 is 12526456124222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3197355253225 + 19044810209296 = 1788115^2 + 4364036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22242165462521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22242165462511) 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, 124955985656 + ... + 124955985833.

It is an arithmetic number, because the mean of its divisors is an integer number (5623019358525).

Almost surely, 2^{22242165462521} is an apocalyptic number.

It is an amenable number.

22242165462521 is a deficient number, since it is larger than the sum of its proper divisors (249911971579).

22242165462521 is an equidigital number, since it uses as much as digits as its factorization.

22242165462521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249911971578.

The product of its digits is 921600, while the sum is 44.

The spelling of 22242165462521 in words is "twenty-two trillion, two hundred forty-two billion, one hundred sixty-five million, four hundred sixty-two thousand, five hundred twenty-one".