22153500 has 120 divisors (see below), whose sum is σ = 72408336. Its totient is φ = 5896800.

The previous prime is 22153457. The next prime is 22153501. The reversal of 22153500 is 535122.

It is a happy number.

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

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22153501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40227 + ... + 40773.

Almost surely, 2^22153500 is an apocalyptic number.

22153500 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 22153500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36204168).

22153500 is an abundant number, since it is smaller than the sum of its proper divisors (50254836).

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

22153500 is a wasteful number, since it uses less digits than its factorization.

22153500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 22153500 is about 4706.7504713974. The cubic root of 22153500 is about 280.8541096689.

Adding to 22153500 its reverse (535122), we get a palindrome (22688622).

The spelling of 22153500 in words is "twenty-two million, one hundred fifty-three thousand, five hundred".