22031224 has 8 divisors (see below), whose sum is σ = 41308560. Its totient is φ = 11015608.

The previous prime is 22031209. The next prime is 22031237. The reversal of 22031224 is 42213022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22031198 and 22031207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1376944 + ... + 1376959.

It is an arithmetic number, because the mean of its divisors is an integer number (5163570).

Almost surely, 2^22031224 is an apocalyptic number.

It is an amenable number.

22031224 is a deficient number, since it is larger than the sum of its proper divisors (19277336).

22031224 is a wasteful number, since it uses less digits than its factorization.

22031224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753909 (or 2753905 counting only the distinct ones).

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

The square root of 22031224 is about 4693.7430692359. The cubic root of 22031224 is about 280.3364323345.

Adding to 22031224 its reverse (42213022), we get a palindrome (64244246).

The spelling of 22031224 in words is "twenty-two million, thirty-one thousand, two hundred twenty-four".