22222405 has 8 divisors (see below), whose sum is σ = 26693784. Its totient is φ = 17760000.

The previous prime is 22222391. The next prime is 22222411. The reversal of 22222405 is 50422222.

It can be written as a sum of positive squares in 4 ways, for example, as 1999396 + 20223009 = 1414^2 + 4497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22222405 - 2⁵ = 22222373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5905 + ... + 8905.

It is an arithmetic number, because the mean of its divisors is an integer number (3336723).

Almost surely, 2^22222405 is an apocalyptic number.

It is an amenable number.

22222405 is a deficient number, since it is larger than the sum of its proper divisors (4471379).

22222405 is a wasteful number, since it uses less digits than its factorization.

22222405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4487.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22222405 is about 4714.0645943814. The cubic root of 22222405 is about 281.1449925689.

Adding to 22222405 its reverse (50422222), we get a palindrome (72644627).

The spelling of 22222405 in words is "twenty-two million, two hundred twenty-two thousand, four hundred five".