346332221 has 4 divisors (see below), whose sum is σ = 351076572. Its totient is φ = 341587872.

The previous prime is 346332193. The next prime is 346332257. The reversal of 346332221 is 122233643.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196392196 + 149940025 = 14014^2 + 12245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346332221 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 (346332421) 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, 2372066 + ... + 2372211.

It is an arithmetic number, because the mean of its divisors is an integer number (87769143).

Almost surely, 2^346332221 is an apocalyptic number.

It is an amenable number.

346332221 is a deficient number, since it is larger than the sum of its proper divisors (4744351).

346332221 is an equidigital number, since it uses as much as digits as its factorization.

346332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744350.

The product of its digits is 5184, while the sum is 26.

The square root of 346332221 is about 18610.0032509401. The cubic root of 346332221 is about 702.2595157147.

Adding to 346332221 its reverse (122233643), we get a palindrome (468565864).

The spelling of 346332221 in words is "three hundred forty-six million, three hundred thirty-two thousand, two hundred twenty-one".