22213740 has 48 divisors (see below), whose sum is σ = 62415360. Its totient is φ = 5903040.

The previous prime is 22213733. The next prime is 22213753. The reversal of 22213740 is 4731222.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25431 + ... + 26289.

It is an arithmetic number, because the mean of its divisors is an integer number (1300320).

Almost surely, 2^22213740 is an apocalyptic number.

22213740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22213740 is an abundant number, since it is smaller than the sum of its proper divisors (40201620).

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

22213740 is a wasteful number, since it uses less digits than its factorization.

22213740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22213740 is about 4713.1454465145. The cubic root of 22213740 is about 281.1084462985.

Adding to 22213740 its reverse (4731222), we get a palindrome (26944962).

The spelling of 22213740 in words is "twenty-two million, two hundred thirteen thousand, seven hundred forty".