345214321 has 4 divisors (see below), whose sum is σ = 347932672. Its totient is φ = 342495972.

The previous prime is 345214271. The next prime is 345214343. The reversal of 345214321 is 123412543.

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 345214321 - 2⁷ = 345214193 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345214391) 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, 1358985 + ... + 1359238.

It is an arithmetic number, because the mean of its divisors is an integer number (86983168).

Almost surely, 2^345214321 is an apocalyptic number.

It is an amenable number.

345214321 is a deficient number, since it is larger than the sum of its proper divisors (2718351).

345214321 is a wasteful number, since it uses less digits than its factorization.

345214321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718350.

The product of its digits is 2880, while the sum is 25.

The square root of 345214321 is about 18579.9440526607. The cubic root of 345214321 is about 701.5031108742.

Adding to 345214321 its reverse (123412543), we get a palindrome (468626864).

It can be divided in two parts, 3452143 and 21, that added together give a square (3452164 = 1858²).

The spelling of 345214321 in words is "three hundred forty-five million, two hundred fourteen thousand, three hundred twenty-one".