350171221 has 4 divisors (see below), whose sum is σ = 350382700. Its totient is φ = 349959744.

The previous prime is 350171209. The next prime is 350171309. The reversal of 350171221 is 122171053.

It is a happy number.

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 239816196 + 110355025 = 15486^2 + 10505^2 .

It is a cyclic number.

It is not a de Polignac number, because 350171221 - 2⁷ = 350171093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 350171192 and 350171201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350171621) 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, 103236 + ... + 106573.

It is an arithmetic number, because the mean of its divisors is an integer number (87595675).

Almost surely, 2^350171221 is an apocalyptic number.

It is an amenable number.

350171221 is a deficient number, since it is larger than the sum of its proper divisors (211479).

350171221 is a wasteful number, since it uses less digits than its factorization.

350171221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211478.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 350171221 is about 18712.8624480596. The cubic root of 350171221 is about 704.8447730946.

The spelling of 350171221 in words is "three hundred fifty million, one hundred seventy-one thousand, two hundred twenty-one".