321442133 has 4 divisors (see below), whose sum is σ = 338360160. Its totient is φ = 304524108.

The previous prime is 321442111. The next prime is 321442139. The reversal of 321442133 is 331244123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 331244123 = 7 ⋅47320589.

It is a cyclic number.

It is not a de Polignac number, because 321442133 - 2¹² = 321438037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321442099 and 321442108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321442139) 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, 8458985 + ... + 8459022.

It is an arithmetic number, because the mean of its divisors is an integer number (84590040).

Almost surely, 2^321442133 is an apocalyptic number.

It is an amenable number.

321442133 is a deficient number, since it is larger than the sum of its proper divisors (16918027).

321442133 is a wasteful number, since it uses less digits than its factorization.

321442133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16918026.

The product of its digits is 1728, while the sum is 23.

The square root of 321442133 is about 17928.8073501837. The cubic root of 321442133 is about 685.0163442919.

Adding to 321442133 its reverse (331244123), we get a palindrome (652686256).

The spelling of 321442133 in words is "three hundred twenty-one million, four hundred forty-two thousand, one hundred thirty-three".