22151224 has 8 divisors (see below), whose sum is σ = 41533560. Its totient is φ = 11075608.

The previous prime is 22151209. The next prime is 22151249. The reversal of 22151224 is 42215122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384444 + ... + 1384459.

It is an arithmetic number, because the mean of its divisors is an integer number (5191695).

Almost surely, 2^22151224 is an apocalyptic number.

It is an amenable number.

22151224 is a deficient number, since it is larger than the sum of its proper divisors (19382336).

22151224 is a wasteful number, since it uses less digits than its factorization.

22151224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768909 (or 2768905 counting only the distinct ones).

The product of its digits is 320, while the sum is 19.

The square root of 22151224 is about 4706.5086847896. The cubic root of 22151224 is about 280.8444912362.

Adding to 22151224 its reverse (42215122), we get a palindrome (64366346).

The spelling of 22151224 in words is "twenty-two million, one hundred fifty-one thousand, two hundred twenty-four".