352304221 has 4 divisors (see below), whose sum is σ = 353437344. Its totient is φ = 351171100.

The previous prime is 352304177. The next prime is 352304233. The reversal of 352304221 is 122403253.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 352304221 - 2²⁷ = 218086493 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 352304192 and 352304201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (352304321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566095 + ... + 566716.

It is an arithmetic number, because the mean of its divisors is an integer number (88359336).

Almost surely, 2^352304221 is an apocalyptic number.

It is an amenable number.

352304221 is a deficient number, since it is larger than the sum of its proper divisors (1133123).

352304221 is a wasteful number, since it uses less digits than its factorization.

352304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133122.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 352304221 is about 18769.7688051824. The cubic root of 352304221 is about 706.2730187397.

Adding to 352304221 its reverse (122403253), we get a palindrome (474707474).

The spelling of 352304221 in words is "three hundred fifty-two million, three hundred four thousand, two hundred twenty-one".