22245520 has 80 divisors (see below), whose sum is σ = 59781888. Its totient is φ = 7608320.

The previous prime is 22245497. The next prime is 22245521. The reversal of 22245520 is 2554222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22245491 and 22245500.

It is not an unprimeable number, because it can be changed into a prime (22245521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14217 + ... + 15703.

Almost surely, 2^22245520 is an apocalyptic number.

22245520 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 22245520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29890944).

22245520 is an abundant number, since it is smaller than the sum of its proper divisors (37536368).

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

22245520 is a wasteful number, since it uses less digits than its factorization.

22245520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1522 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 22245520 is about 4716.5156630716. The cubic root of 22245520 is about 281.2424379860.

Adding to 22245520 its reverse (2554222), we get a palindrome (24799742).

It can be divided in two parts, 2224 and 5520, that added together give a square (7744 = 88²).

The spelling of 22245520 in words is "twenty-two million, two hundred forty-five thousand, five hundred twenty".