353435221 has 4 divisors (see below), whose sum is σ = 353987244. Its totient is φ = 352883200.

The previous prime is 353435191. The next prime is 353435279. The reversal of 353435221 is 122534353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122534353 = 5393 ⋅22721.

It can be written as a sum of positive squares in 2 ways, for example, as 219454596 + 133980625 = 14814^2 + 11575^2 .

It is a cyclic number.

It is not a de Polignac number, because 353435221 - 2²¹ = 351338069 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 353435221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353435521) 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, 275050 + ... + 276331.

It is an arithmetic number, because the mean of its divisors is an integer number (88496811).

Almost surely, 2^353435221 is an apocalyptic number.

It is an amenable number.

353435221 is a deficient number, since it is larger than the sum of its proper divisors (552023).

353435221 is an equidigital number, since it uses as much as digits as its factorization.

353435221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552022.

The product of its digits is 10800, while the sum is 28.

The square root of 353435221 is about 18799.8728985065. The cubic root of 353435221 is about 707.0279926791.

Adding to 353435221 its reverse (122534353), we get a palindrome (475969574).

The spelling of 353435221 in words is "three hundred fifty-three million, four hundred thirty-five thousand, two hundred twenty-one".