354221 has 6 divisors (see below), whose sum is σ = 412110. Its totient is φ = 303576.

The previous prime is 354209. The next prime is 354247. The reversal of 354221 is 122453.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 196 = 595^2 + 14^2 .

It is not a de Polignac number, because 354221 - 2¹⁴ = 337837 is a prime.

It is a super-3 number, since 3×354221³ = 133335001163807583, which contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 354221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3566 + ... + 3663.

It is an arithmetic number, because the mean of its divisors is an integer number (68685).

2³⁵⁴²²¹ is an apocalyptic number.

It is an amenable number.

354221 is a deficient number, since it is larger than the sum of its proper divisors (57889).

354221 is an equidigital number, since it uses as much as digits as its factorization.

354221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243 (or 7236 counting only the distinct ones).

The product of its digits is 240, while the sum is 17.

The square root of 354221 is about 595.1646830920. The cubic root of 354221 is about 70.7551574276.

Adding to 354221 its reverse (122453), we get a palindrome (476674).

It can be divided in two parts, 354 and 221, that added together give a palindrome (575).

The spelling of 354221 in words is "three hundred fifty-four thousand, two hundred twenty-one".