353213321 has 8 divisors (see below), whose sum is σ = 358736040. Its totient is φ = 347725312.

The previous prime is 353213303. The next prime is 353213351. The reversal of 353213321 is 123312353.

It can be written as a sum of positive squares in 4 ways, for example, as 2175625 + 351037696 = 1475^2 + 18736^2 .

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 353213321 - 2⁶ = 353213257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (353213351) 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, 12221 + ... + 29253.

It is an arithmetic number, because the mean of its divisors is an integer number (44842005).

Almost surely, 2^353213321 is an apocalyptic number.

It is an amenable number.

353213321 is a deficient number, since it is larger than the sum of its proper divisors (5522719).

353213321 is a wasteful number, since it uses less digits than its factorization.

353213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17355.

The product of its digits is 1620, while the sum is 23.

The square root of 353213321 is about 18793.9703362541. The cubic root of 353213321 is about 706.8799953966.

Adding to 353213321 its reverse (123312353), we get a palindrome (476525674).

The spelling of 353213321 in words is "three hundred fifty-three million, two hundred thirteen thousand, three hundred twenty-one".