22143040 has 28 divisors (see below), whose sum is σ = 52728876. Its totient is φ = 8857088.

The previous prime is 22143019. The next prime is 22143041. The reversal of 22143040 is 4034122.

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 7884864 = 3776^2 + 2808^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (22143041) 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, 34279 + ... + 34918.

Almost surely, 2^22143040 is an apocalyptic number.

22143040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22143040 is an abundant number, since it is smaller than the sum of its proper divisors (30585836).

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

22143040 is an equidigital number, since it uses as much as digits as its factorization.

22143040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69214 (or 69204 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22143040 is about 4705.6391701872. The cubic root of 22143040 is about 280.8099000035.

Adding to 22143040 its reverse (4034122), we get a palindrome (26177162).

The spelling of 22143040 in words is "twenty-two million, one hundred forty-three thousand, forty".