350000221 has 4 divisors (see below), whose sum is σ = 350328700. Its totient is φ = 349671744.

The previous prime is 350000143. The next prime is 350000239. The reversal of 350000221 is 122000053.

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 287811225 + 62188996 = 16965^2 + 7886^2 .

It is a cyclic number.

It is not a de Polignac number, because 350000221 - 2²⁷ = 215782493 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 (350000281) 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, 162636 + ... + 164773.

It is an arithmetic number, because the mean of its divisors is an integer number (87582175).

Almost surely, 2^350000221 is an apocalyptic number.

It is an amenable number.

350000221 is a deficient number, since it is larger than the sum of its proper divisors (328479).

350000221 is a wasteful number, since it uses less digits than its factorization.

350000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328478.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 350000221 is about 18708.2928403422. The cubic root of 350000221 is about 704.7300215353.

Adding to 350000221 its reverse (122000053), we get a palindrome (472000274).

The spelling of 350000221 in words is "three hundred fifty million, two hundred twenty-one", and thus it is an aban number.