321422197 has 4 divisors (see below), whose sum is σ = 321922720. Its totient is φ = 320921676.

The previous prime is 321422173. The next prime is 321422209. The reversal of 321422197 is 791224123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321422197 - 2¹¹ = 321420149 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 (321422117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249297 + ... + 250582.

It is an arithmetic number, because the mean of its divisors is an integer number (80480680).

Almost surely, 2^321422197 is an apocalyptic number.

It is an amenable number.

321422197 is a deficient number, since it is larger than the sum of its proper divisors (500523).

321422197 is an equidigital number, since it uses as much as digits as its factorization.

321422197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500522.

The product of its digits is 6048, while the sum is 31.

The square root of 321422197 is about 17928.2513648153. The cubic root of 321422197 is about 685.0021823150.

The spelling of 321422197 in words is "three hundred twenty-one million, four hundred twenty-two thousand, one hundred ninety-seven".