22213040 has 20 divisors (see below), whose sum is σ = 51645504. Its totient is φ = 8885184.

The previous prime is 22213007. The next prime is 22213049. The reversal of 22213040 is 4031222.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (22213049) 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, 138752 + ... + 138911.

Almost surely, 2^22213040 is an apocalyptic number.

22213040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22213040 is an abundant number, since it is smaller than the sum of its proper divisors (29432464).

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

22213040 is a wasteful number, since it uses less digits than its factorization.

22213040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277676 (or 277670 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22213040 is about 4713.0711855435. The cubic root of 22213040 is about 281.1054935018.

Adding to 22213040 its reverse (4031222), we get a palindrome (26244262).

The spelling of 22213040 in words is "twenty-two million, two hundred thirteen thousand, forty".