22272472 has 8 divisors (see below), whose sum is σ = 41760900. Its totient is φ = 11136232.

The previous prime is 22272457. The next prime is 22272473. The reversal of 22272472 is 27427222.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22272472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22272473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392022 + ... + 1392037.

Almost surely, 2^22272472 is an apocalyptic number.

It is an amenable number.

22272472 is a deficient number, since it is larger than the sum of its proper divisors (19488428).

22272472 is a wasteful number, since it uses less digits than its factorization.

22272472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784065 (or 2784061 counting only the distinct ones).

The product of its digits is 6272, while the sum is 28.

The square root of 22272472 is about 4719.3719921193. The cubic root of 22272472 is about 281.3559737600.

Adding to 22272472 its reverse (27427222), we get a palindrome (49699694).

The spelling of 22272472 in words is "twenty-two million, two hundred seventy-two thousand, four hundred seventy-two".