22154544 has 60 divisors (see below), whose sum is σ = 62510136. Its totient is φ = 7324416.

The previous prime is 22154533. The next prime is 22154549. The reversal of 22154544 is 44545122.

It is not an unprimeable number, because it can be changed into a prime (22154549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19167 + ... + 20289.

Almost surely, 2^22154544 is an apocalyptic number.

22154544 is a gapful number since it is divisible by the number (24) 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 22154544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31255068).

22154544 is an abundant number, since it is smaller than the sum of its proper divisors (40355592).

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

22154544 is a wasteful number, since it uses less digits than its factorization.

22154544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1265 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 22154544 is about 4706.8613746317. The cubic root of 22154544 is about 280.8585214185.

Adding to 22154544 its reverse (44545122), we get a palindrome (66699666).

The spelling of 22154544 in words is "twenty-two million, one hundred fifty-four thousand, five hundred forty-four".