22015406 has 24 divisors (see below), whose sum is σ = 38600856. Its totient is φ = 9389520.

The previous prime is 22015403. The next prime is 22015417. The reversal of 22015406 is 60451022.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22015403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26741 + ... + 27551.

It is an arithmetic number, because the mean of its divisors is an integer number (1608369).

Almost surely, 2^22015406 is an apocalyptic number.

22015406 is a deficient number, since it is larger than the sum of its proper divisors (16585450).

22015406 is a wasteful number, since it uses less digits than its factorization.

22015406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22015406 is about 4692.0577575303. The cubic root of 22015406 is about 280.2693241948.

Adding to 22015406 its reverse (60451022), we get a palindrome (82466428).

The spelling of 22015406 in words is "twenty-two million, fifteen thousand, four hundred six".