22220345 has 16 divisors (see below), whose sum is σ = 30844800. Its totient is φ = 15051264.

The previous prime is 22220339. The next prime is 22220357. The reversal of 22220345 is 54302222.

It is a cyclic number.

It is not a de Polignac number, because 22220345 - 2⁶ = 22220281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920 + ... + 6729.

It is an arithmetic number, because the mean of its divisors is an integer number (1927800).

Almost surely, 2^22220345 is an apocalyptic number.

It is an amenable number.

22220345 is a deficient number, since it is larger than the sum of its proper divisors (8624455).

22220345 is an equidigital number, since it uses as much as digits as its factorization.

22220345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 22220345 is about 4713.8460942207. The cubic root of 22220345 is about 281.1363049916.

Adding to 22220345 its reverse (54302222), we get a palindrome (76522567).

The spelling of 22220345 in words is "twenty-two million, two hundred twenty thousand, three hundred forty-five".