345345221 has 8 divisors (see below), whose sum is σ = 373125984. Its totient is φ = 317738160.

The previous prime is 345345167. The next prime is 345345223. The reversal of 345345221 is 122543543.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345345221 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 (345345223) 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, 39275 + ... + 47256.

It is an arithmetic number, because the mean of its divisors is an integer number (46640748).

Almost surely, 2^345345221 is an apocalyptic number.

It is an amenable number.

345345221 is a deficient number, since it is larger than the sum of its proper divisors (27780763).

345345221 is a wasteful number, since it uses less digits than its factorization.

345345221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86851.

The product of its digits is 14400, while the sum is 29.

The square root of 345345221 is about 18583.4663343522. The cubic root of 345345221 is about 701.5917660928.

Adding to 345345221 its reverse (122543543), we get a palindrome (467888764).

The spelling of 345345221 in words is "three hundred forty-five million, three hundred forty-five thousand, two hundred twenty-one".