345555321 has 8 divisors (see below), whose sum is σ = 473193024. Its totient is φ = 224143920.

The previous prime is 345555317. The next prime is 345555349. The reversal of 345555321 is 123555543.

It is a happy number.

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

It is not a de Polignac number, because 345555321 - 2² = 345555317 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (345555391) 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, 1556445 + ... + 1556666.

It is an arithmetic number, because the mean of its divisors is an integer number (59149128).

Almost surely, 2^345555321 is an apocalyptic number.

It is an amenable number.

345555321 is a deficient number, since it is larger than the sum of its proper divisors (127637703).

345555321 is a wasteful number, since it uses less digits than its factorization.

345555321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113151.

The product of its digits is 45000, while the sum is 33.

The square root of 345555321 is about 18589.1183491848. The cubic root of 345555321 is about 701.7340146205.

The spelling of 345555321 in words is "three hundred forty-five million, five hundred fifty-five thousand, three hundred twenty-one".