22550240 has 24 divisors (see below), whose sum is σ = 53275320. Its totient is φ = 9020032.

The previous prime is 22550219. The next prime is 22550243. The reversal of 22550240 is 4205522.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22550243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70310 + ... + 70629.

It is an arithmetic number, because the mean of its divisors is an integer number (2219805).

Almost surely, 2^22550240 is an apocalyptic number.

22550240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22550240 is an abundant number, since it is smaller than the sum of its proper divisors (30725080).

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

22550240 is a wasteful number, since it uses less digits than its factorization.

22550240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140954 (or 140946 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22550240 is about 4748.7092983252. The cubic root of 22550240 is about 282.5207753536.

Adding to 22550240 its reverse (4205522), we get a palindrome (26755762).

The spelling of 22550240 in words is "twenty-two million, five hundred fifty thousand, two hundred forty".