354212221 has 16 divisors (see below), whose sum is σ = 414339840. Its totient is φ = 299220480.

The previous prime is 354212219. The next prime is 354212237. The reversal of 354212221 is 122212453.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 354212221 - 2¹ = 354212219 is a prime.

It is a super-3 number, since 3×354212221³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 354212192 and 354212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354212291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2785 + ... + 26761.

It is an arithmetic number, because the mean of its divisors is an integer number (25896240).

Almost surely, 2^354212221 is an apocalyptic number.

It is an amenable number.

354212221 is a deficient number, since it is larger than the sum of its proper divisors (60127619).

354212221 is a wasteful number, since it uses less digits than its factorization.

354212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24084.

The product of its digits is 960, while the sum is 22.

The square root of 354212221 is about 18820.5265866819. The cubic root of 354212221 is about 707.5457289176.

Adding to 354212221 its reverse (122212453), we get a palindrome (476424674).

The spelling of 354212221 in words is "three hundred fifty-four million, two hundred twelve thousand, two hundred twenty-one".