22015220 has 24 divisors (see below), whose sum is σ = 46685184. Its totient is φ = 8719776.

The previous prime is 22015219. The next prime is 22015241. The reversal of 22015220 is 2251022.

It is a junction number, because it is equal to n+sod(n) for n = 22015195 and 22015204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3284 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (1945216).

Almost surely, 2^22015220 is an apocalyptic number.

22015220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22015220 is an abundant number, since it is smaller than the sum of its proper divisors (24669964).

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

22015220 is a wasteful number, since it uses less digits than its factorization.

22015220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10799 (or 10797 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22015220 is about 4692.0379367605. The cubic root of 22015220 is about 280.2685348954.

Adding to 22015220 its reverse (2251022), we get a palindrome (24266242).

The spelling of 22015220 in words is "twenty-two million, fifteen thousand, two hundred twenty".