354227221 has 2 divisors, whose sum is σ = 354227222. Its totient is φ = 354227220.

The previous prime is 354227179. The next prime is 354227227. The reversal of 354227221 is 122722453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352500625 + 1726596 = 18775^2 + 1314^2 .

It is a cyclic number.

It is not a de Polignac number, because 354227221 - 2¹¹ = 354225173 is a prime.

It is a super-3 number, since 3×354227221³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 354227221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354227227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177113610 + 177113611.

It is an arithmetic number, because the mean of its divisors is an integer number (177113611).

Almost surely, 2^354227221 is an apocalyptic number.

It is an amenable number.

354227221 is a deficient number, since it is larger than the sum of its proper divisors (1).

354227221 is an equidigital number, since it uses as much as digits as its factorization.

354227221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 354227221 is about 18820.9250835340. The cubic root of 354227221 is about 707.5557163728. Note that the first 3 decimals are identical.

Adding to 354227221 its reverse (122722453), we get a palindrome (476949674).

The spelling of 354227221 in words is "three hundred fifty-four million, two hundred twenty-seven thousand, two hundred twenty-one".