22220405 has 16 divisors (see below), whose sum is σ = 28272000. Its totient is φ = 16718400.

The previous prime is 22220399. The next prime is 22220417. The reversal of 22220405 is 50402222.

It is a de Polignac number, because none of the positive numbers 2^k-22220405 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13571 + ... + 15119.

It is an arithmetic number, because the mean of its divisors is an integer number (1767000).

Almost surely, 2^22220405 is an apocalyptic number.

It is an amenable number.

22220405 is a deficient number, since it is larger than the sum of its proper divisors (6051595).

22220405 is a wasteful number, since it uses less digits than its factorization.

22220405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 22220405 is about 4713.8524584463. The cubic root of 22220405 is about 281.1365580354.

Adding to 22220405 its reverse (50402222), we get a palindrome (72622627).

The spelling of 22220405 in words is "twenty-two million, two hundred twenty thousand, four hundred five".