321343421 has 6 divisors (see below), whose sum is σ = 373807710. Its totient is φ = 275437176.

The previous prime is 321343391. The next prime is 321343433. The reversal of 321343421 is 124343123.

It can be written as a sum of positive squares in only one way, i.e., 300640921 + 20702500 = 17339^2 + 4550^2 .

It is not a de Polignac number, because 321343421 - 2¹⁴ = 321327037 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 (321343471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3278966 + ... + 3279063.

It is an arithmetic number, because the mean of its divisors is an integer number (62301285).

Almost surely, 2^321343421 is an apocalyptic number.

It is an amenable number.

321343421 is a deficient number, since it is larger than the sum of its proper divisors (52464289).

321343421 is an equidigital number, since it uses as much as digits as its factorization.

321343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558043 (or 6558036 counting only the distinct ones).

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

The square root of 321343421 is about 17926.0542507268. The cubic root of 321343421 is about 684.9462163182.

Adding to 321343421 its reverse (124343123), we get a palindrome (445686544).

The spelling of 321343421 in words is "three hundred twenty-one million, three hundred forty-three thousand, four hundred twenty-one".