422520304215221 has 4 divisors (see below), whose sum is σ = 422524899066732. Its totient is φ = 422515709363712.

The previous prime is 422520304215169. The next prime is 422520304215293. The reversal of 422520304215221 is 122512403025224.

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 222990158451025 + 199530145764196 = 14932855^2 + 14125514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422520304215221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422520304815221) 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, 2297287820 + ... + 2297471733.

It is an arithmetic number, because the mean of its divisors is an integer number (105631224766683).

Almost surely, 2^{422520304215221} is an apocalyptic number.

It is an amenable number.

422520304215221 is a deficient number, since it is larger than the sum of its proper divisors (4594851511).

422520304215221 is an equidigital number, since it uses as much as digits as its factorization.

422520304215221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594851510.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 422520304215221 in words is "four hundred twenty-two trillion, five hundred twenty billion, three hundred four million, two hundred fifteen thousand, two hundred twenty-one".