22221140 has 12 divisors (see below), whose sum is σ = 46664436. Its totient is φ = 8888448.

The previous prime is 22221109. The next prime is 22221161. The reversal of 22221140 is 4112222.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 10837264 = 3374^2 + 3292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555509 + ... + 555548.

It is an arithmetic number, because the mean of its divisors is an integer number (3888703).

Almost surely, 2^22221140 is an apocalyptic number.

22221140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221140 is an abundant number, since it is smaller than the sum of its proper divisors (24443296).

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

22221140 is a wasteful number, since it uses less digits than its factorization.

22221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111066 (or 1111064 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 22221140 is about 4713.9304195119. The cubic root of 22221140 is about 281.1396577853.

Adding to 22221140 its reverse (4112222), we get a palindrome (26333362).

The spelling of 22221140 in words is "twenty-two million, two hundred twenty-one thousand, one hundred forty".