353440221 has 8 divisors (see below), whose sum is σ = 472117344. Its totient is φ = 235194960.

The previous prime is 353440189. The next prime is 353440249. The reversal of 353440221 is 122044353.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 353440221 - 2⁵ = 353440189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 353440191 and 353440200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353440121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106050 + ... + 109331.

It is an arithmetic number, because the mean of its divisors is an integer number (59014668).

Almost surely, 2^353440221 is an apocalyptic number.

It is an amenable number.

353440221 is a deficient number, since it is larger than the sum of its proper divisors (118677123).

353440221 is a wasteful number, since it uses less digits than its factorization.

353440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215931.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 353440221 is about 18800.0058776587. The cubic root of 353440221 is about 707.0313267397.

Adding to 353440221 its reverse (122044353), we get a palindrome (475484574).

The spelling of 353440221 in words is "three hundred fifty-three million, four hundred forty thousand, two hundred twenty-one".