345222321 has 16 divisors (see below), whose sum is σ = 477625344. Its totient is φ = 221612544.

The previous prime is 345222313. The next prime is 345222347. The reversal of 345222321 is 123222543.

It is not a de Polignac number, because 345222321 - 2³ = 345222313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345222291 and 345222300.

It is not an unprimeable number, because it can be changed into a prime (345222121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5265 + ... + 26798.

It is an arithmetic number, because the mean of its divisors is an integer number (29851584).

Almost surely, 2^345222321 is an apocalyptic number.

It is an amenable number.

345222321 is a deficient number, since it is larger than the sum of its proper divisors (132403023).

345222321 is a wasteful number, since it uses less digits than its factorization.

345222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32200.

The product of its digits is 2880, while the sum is 24.

The square root of 345222321 is about 18580.1593373146. The cubic root of 345222321 is about 701.5085297123.

Adding to 345222321 its reverse (123222543), we get a palindrome (468444864).

It can be divided in two parts, 345222 and 321, that added together give a palindrome (345543).

The spelling of 345222321 in words is "three hundred forty-five million, two hundred twenty-two thousand, three hundred twenty-one".