353424221 has 2 divisors, whose sum is σ = 353424222. Its totient is φ = 353424220.

The previous prime is 353424217. The next prime is 353424277. The reversal of 353424221 is 122424353.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346480996 + 6943225 = 18614^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 353424221 - 2² = 353424217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353424121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176712110 + 176712111.

It is an arithmetic number, because the mean of its divisors is an integer number (176712111).

Almost surely, 2^353424221 is an apocalyptic number.

It is an amenable number.

353424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

353424221 is an equidigital number, since it uses as much as digits as its factorization.

353424221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 26.

The square root of 353424221 is about 18799.5803410608. The cubic root of 353424221 is about 707.0206576352.

Adding to 353424221 its reverse (122424353), we get a palindrome (475848574).

The spelling of 353424221 in words is "three hundred fifty-three million, four hundred twenty-four thousand, two hundred twenty-one".