13220345 has 8 divisors (see below), whose sum is σ = 15922176. Its totient is φ = 10537776.

The previous prime is 13220329. The next prime is 13220351. The reversal of 13220345 is 54302231.

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 not a de Polignac number, because 13220345 - 2⁴ = 13220329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3257 + ... + 6086.

It is an arithmetic number, because the mean of its divisors is an integer number (1990272).

Almost surely, 2^13220345 is an apocalyptic number.

It is an amenable number.

13220345 is a deficient number, since it is larger than the sum of its proper divisors (2701831).

13220345 is an equidigital number, since it uses as much as digits as its factorization.

13220345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9631.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13220345 is about 3635.9792353643. The cubic root of 13220345 is about 236.4545069061.

Adding to 13220345 its reverse (54302231), we get a palindrome (67522576).

The spelling of 13220345 in words is "thirteen million, two hundred twenty thousand, three hundred forty-five".