345004221 has 4 divisors (see below), whose sum is σ = 460005632. Its totient is φ = 230002812.

The previous prime is 345004207. The next prime is 345004229. The reversal of 345004221 is 122400543.

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 not a de Polignac number, because 345004221 - 2¹¹ = 345002173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345004229) 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 3 ways as a sum of consecutive naturals, for example, 57500701 + ... + 57500706.

It is an arithmetic number, because the mean of its divisors is an integer number (115001408).

Almost surely, 2^345004221 is an apocalyptic number.

It is an amenable number.

345004221 is a deficient number, since it is larger than the sum of its proper divisors (115001411).

345004221 is a wasteful number, since it uses less digits than its factorization.

345004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115001410.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 345004221 is about 18574.2892461596. The cubic root of 345004221 is about 701.3607686588.

Adding to 345004221 its reverse (122400543), we get a palindrome (467404764).

The spelling of 345004221 in words is "three hundred forty-five million, four thousand, two hundred twenty-one".