22220965 has 12 divisors (see below), whose sum is σ = 28875204. Its totient is φ = 16408704.

The previous prime is 22220963. The next prime is 22220971. The reversal of 22220965 is 56902222.

It can be written as a sum of positive squares in 6 ways, for example, as 4639716 + 17581249 = 2154^2 + 4193^2 .

It is not a de Polignac number, because 22220965 - 2¹ = 22220963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12304 + ... + 13993.

It is an arithmetic number, because the mean of its divisors is an integer number (2406267).

Almost surely, 2^22220965 is an apocalyptic number.

It is an amenable number.

22220965 is a deficient number, since it is larger than the sum of its proper divisors (6654239).

22220965 is a wasteful number, since it uses less digits than its factorization.

22220965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26328 (or 26315 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22220965 is about 4713.9118574704. The cubic root of 22220965 is about 281.1389197558.

The spelling of 22220965 in words is "twenty-two million, two hundred twenty thousand, nine hundred sixty-five".