354513221 has 2 divisors, whose sum is σ = 354513222. Its totient is φ = 354513220.

The previous prime is 354513209. The next prime is 354513227. The reversal of 354513221 is 122315453.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300328900 + 54184321 = 17330^2 + 7361^2 .

It is a cyclic number.

It is not a de Polignac number, because 354513221 - 2¹⁸ = 354251077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354513227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177256610 + 177256611.

It is an arithmetic number, because the mean of its divisors is an integer number (177256611).

Almost surely, 2^354513221 is an apocalyptic number.

It is an amenable number.

354513221 is a deficient number, since it is larger than the sum of its proper divisors (1).

354513221 is an equidigital number, since it uses as much as digits as its factorization.

354513221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 354513221 is about 18828.5214767384. The cubic root of 354513221 is about 707.7460899389.

Adding to 354513221 its reverse (122315453), we get a palindrome (476828674).

The spelling of 354513221 in words is "three hundred fifty-four million, five hundred thirteen thousand, two hundred twenty-one".