321422091 has 4 divisors (see below), whose sum is σ = 428562792. Its totient is φ = 214281392.

The previous prime is 321422089. The next prime is 321422099. The reversal of 321422091 is 190224123.

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

It is a cyclic number.

It is not a de Polignac number, because 321422091 - 2¹ = 321422089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321422099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53570346 + ... + 53570351.

It is an arithmetic number, because the mean of its divisors is an integer number (107140698).

Almost surely, 2^321422091 is an apocalyptic number.

321422091 is a deficient number, since it is larger than the sum of its proper divisors (107140701).

321422091 is a wasteful number, since it uses less digits than its factorization.

321422091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107140700.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 321422091 is about 17928.2484085869. The cubic root of 321422091 is about 685.0021070140.

The spelling of 321422091 in words is "three hundred twenty-one million, four hundred twenty-two thousand, ninety-one".