350013221 has 4 divisors (see below), whose sum is σ = 370602252. Its totient is φ = 329424192.

The previous prime is 350013179. The next prime is 350013227. The reversal of 350013221 is 122310053.

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 156525121 + 193488100 = 12511^2 + 13910^2 .

It is a cyclic number.

It is not a de Polignac number, because 350013221 - 2¹⁰ = 350012197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 20589013 = 350013221 / (3 + 5 + 0 + 0 + 1 + 3 + 2 + 2 + 1).

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 350013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350013227) 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, 10294490 + ... + 10294523.

It is an arithmetic number, because the mean of its divisors is an integer number (92650563).

Almost surely, 2^350013221 is an apocalyptic number.

It is an amenable number.

350013221 is a deficient number, since it is larger than the sum of its proper divisors (20589031).

350013221 is a wasteful number, since it uses less digits than its factorization.

350013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20589030.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 350013221 is about 18708.6402766209. The cubic root of 350013221 is about 704.7387466506.

Adding to 350013221 its reverse (122310053), we get a palindrome (472323274).

The spelling of 350013221 in words is "three hundred fifty million, thirteen thousand, two hundred twenty-one".