321404213 has 8 divisors (see below), whose sum is σ = 346347288. Its totient is φ = 296492544.

The previous prime is 321404203. The next prime is 321404257. The reversal of 321404213 is 312404123.

It can be written as a sum of positive squares in 4 ways, for example, as 23600164 + 297804049 = 4858^2 + 17257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321404213 - 2¹⁰ = 321403189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321404203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16145 + ... + 30057.

It is an arithmetic number, because the mean of its divisors is an integer number (43293411).

Almost surely, 2^321404213 is an apocalyptic number.

It is an amenable number.

321404213 is a deficient number, since it is larger than the sum of its proper divisors (24943075).

321404213 is a wasteful number, since it uses less digits than its factorization.

321404213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15703.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 321404213 is about 17927.7498030288. The cubic root of 321404213 is about 684.9894064819.

Adding to 321404213 its reverse (312404123), we get a palindrome (633808336).

The spelling of 321404213 in words is "three hundred twenty-one million, four hundred four thousand, two hundred thirteen".