22540000 has 180 divisors, whose sum is σ = 67309704. Its totient is φ = 7392000.

The previous prime is 22539983. The next prime is 22540003. The reversal of 22540000 is 4522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540003) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 979989 + ... + 980011.

Almost surely, 2^22540000 is an apocalyptic number.

22540000 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 22540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33654852).

22540000 is an abundant number, since it is smaller than the sum of its proper divisors (44769704).

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

22540000 is an equidigital number, since it uses as much as digits as its factorization.

22540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22540000 is about 4747.6309881877. The cubic root of 22540000 is about 282.4780049182.

Adding to 22540000 its reverse (4522), we get a palindrome (22544522).

It can be divided in two parts, 225 and 40000, that multiplied together give a square (9000000 = 3000²).

The spelling of 22540000 in words is "twenty-two million, five hundred forty thousand".