353243421 has 12 divisors (see below), whose sum is σ = 537095520. Its totient is φ = 223101000.

The previous prime is 353243393. The next prime is 353243447. The reversal of 353243421 is 124342353.

It is not a de Polignac number, because 353243421 - 2¹⁵ = 353210653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353243021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1032705 + ... + 1033046.

It is an arithmetic number, because the mean of its divisors is an integer number (44757960).

Almost surely, 2^353243421 is an apocalyptic number.

It is an amenable number.

353243421 is a deficient number, since it is larger than the sum of its proper divisors (183852099).

353243421 is a wasteful number, since it uses less digits than its factorization.

353243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065776 (or 2065773 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 353243421 is about 18794.7711079438. The cubic root of 353243421 is about 706.9000743708.

Adding to 353243421 its reverse (124342353), we get a palindrome (477585774).

The spelling of 353243421 in words is "three hundred fifty-three million, two hundred forty-three thousand, four hundred twenty-one".