22015830 has 32 divisors (see below), whose sum is σ = 55137024. Its totient is φ = 5615456.

The previous prime is 22015801. The next prime is 22015883. The reversal of 22015830 is 3851022.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22015797 and 22015806.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15264 + ... + 16643.

It is an arithmetic number, because the mean of its divisors is an integer number (1723032).

Almost surely, 2^22015830 is an apocalyptic number.

22015830 is an abundant number, since it is smaller than the sum of its proper divisors (33121194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22015830 is a wasteful number, since it uses less digits than its factorization.

22015830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31940.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 22015830 is about 4692.1029400472. The cubic root of 22015830 is about 280.2711234414.

Adding to 22015830 its reverse (3851022), we get a palindrome (25866852).

The spelling of 22015830 in words is "twenty-two million, fifteen thousand, eight hundred thirty".