22445500 has 144 divisors (see below), whose sum is σ = 62741952. Its totient is φ = 6864000.

The previous prime is 22445483. The next prime is 22445503. The reversal of 22445500 is 554422.

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

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22445503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 423474 + ... + 423526.

It is an arithmetic number, because the mean of its divisors is an integer number (435708).

Almost surely, 2^22445500 is an apocalyptic number.

22445500 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 22445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31370976).

22445500 is an abundant number, since it is smaller than the sum of its proper divisors (40296452).

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

22445500 is a wasteful number, since it uses less digits than its factorization.

22445500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 78 counting only the distinct ones).

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

The square root of 22445500 is about 4737.6682028188. The cubic root of 22445500 is about 282.0826845378.

Adding to 22445500 its reverse (554422), we get a palindrome (22999922).

It can be divided in two parts, 22445 and 500, that multiplied together give a square (11222500 = 3350²).

The spelling of 22445500 in words is "twenty-two million, four hundred forty-five thousand, five hundred".