321340133 has 4 divisors (see below), whose sum is σ = 321768768. Its totient is φ = 320911500.

The previous prime is 321340111. The next prime is 321340157. The reversal of 321340133 is 331043123.

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 321340133 - 2¹⁸ = 321077989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321340183) 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, 213191 + ... + 214692.

It is an arithmetic number, because the mean of its divisors is an integer number (80442192).

Almost surely, 2^321340133 is an apocalyptic number.

It is an amenable number.

321340133 is a deficient number, since it is larger than the sum of its proper divisors (428635).

321340133 is an equidigital number, since it uses as much as digits as its factorization.

321340133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428634.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 321340133 is about 17925.9625404049. The cubic root of 321340133 is about 684.9438801770.

Adding to 321340133 its reverse (331043123), we get a palindrome (652383256).

The spelling of 321340133 in words is "three hundred twenty-one million, three hundred forty thousand, one hundred thirty-three".