321642227 has 4 divisors (see below), whose sum is σ = 340562376. Its totient is φ = 302722080.

The previous prime is 321642199. The next prime is 321642229. The reversal of 321642227 is 722246123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722246123 = 1297 ⋅556859.

It is a cyclic number.

It is not a de Polignac number, because 321642227 - 2⁶ = 321642163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321642227.

It is not an unprimeable number, because it can be changed into a prime (321642229) 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 3 ways as a sum of consecutive naturals, for example, 9460049 + ... + 9460082.

It is an arithmetic number, because the mean of its divisors is an integer number (85140594).

Almost surely, 2^321642227 is an apocalyptic number.

321642227 is a deficient number, since it is larger than the sum of its proper divisors (18920149).

321642227 is a wasteful number, since it uses less digits than its factorization.

321642227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18920148.

The product of its digits is 8064, while the sum is 29.

The square root of 321642227 is about 17934.3867193724. The cubic root of 321642227 is about 685.1584530523.

The spelling of 321642227 in words is "three hundred twenty-one million, six hundred forty-two thousand, two hundred twenty-seven".