353623221 has 24 divisors (see below), whose sum is σ = 584442560. Its totient is φ = 201833856.

The previous prime is 353623219. The next prime is 353623241. The reversal of 353623221 is 122326353.

353623221 is a `hidden beast` number, since 35 + 3 + 623 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 353623221 - 2¹ = 353623219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353623241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60786 + ... + 66348.

Almost surely, 2^353623221 is an apocalyptic number.

It is an amenable number.

353623221 is a deficient number, since it is larger than the sum of its proper divisors (230819339).

353623221 is a wasteful number, since it uses less digits than its factorization.

353623221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585 (or 6582 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 353623221 is about 18804.8722675800. The cubic root of 353623221 is about 707.1533317264.

Adding to 353623221 its reverse (122326353), we get a palindrome (475949574).

It can be divided in two parts, 35362 and 3221, that added together give a palindrome (38583).

The spelling of 353623221 in words is "three hundred fifty-three million, six hundred twenty-three thousand, two hundred twenty-one".