22214520 has 128 divisors (see below), whose sum is σ = 75398400. Its totient is φ = 5816448.

The previous prime is 22214519. The next prime is 22214537. The reversal of 22214520 is 2541222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22214493 and 22214502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72207 + ... + 72513.

It is an arithmetic number, because the mean of its divisors is an integer number (589050).

Almost surely, 2^22214520 is an apocalyptic number.

22214520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22214520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37699200).

22214520 is an abundant number, since it is smaller than the sum of its proper divisors (53183880).

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

22214520 is a wasteful number, since it uses less digits than its factorization.

22214520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22214520 is about 4713.2281930753. The cubic root of 22214520 is about 281.1117364847. Note that the first 3 decimals are identical.

Adding to 22214520 its reverse (2541222), we get a palindrome (24755742).

The spelling of 22214520 in words is "twenty-two million, two hundred fourteen thousand, five hundred twenty".