353363221 has 4 divisors (see below), whose sum is σ = 353418412. Its totient is φ = 353308032.

The previous prime is 353363189. The next prime is 353363239. The reversal of 353363221 is 122363353.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108784900 + 244578321 = 10430^2 + 15639^2 .

It is a cyclic number.

It is not a de Polignac number, because 353363221 - 2⁵ = 353363189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 353363221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353363281) 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, 16506 + ... + 31291.

It is an arithmetic number, because the mean of its divisors is an integer number (88354603).

Almost surely, 2^353363221 is an apocalyptic number.

It is an amenable number.

353363221 is a deficient number, since it is larger than the sum of its proper divisors (55191).

353363221 is an equidigital number, since it uses as much as digits as its factorization.

353363221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55190.

The product of its digits is 9720, while the sum is 28.

The square root of 353363221 is about 18797.9578944097. The cubic root of 353363221 is about 706.9799787201.

The spelling of 353363221 in words is "three hundred fifty-three million, three hundred sixty-three thousand, two hundred twenty-one".