22251704 has 8 divisors (see below), whose sum is σ = 41721960. Its totient is φ = 11125848.

The previous prime is 22251661. The next prime is 22251709. The reversal of 22251704 is 40715222.

It is a happy number.

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 22251704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251709) by changing a digit.

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, 1390724 + ... + 1390739.

It is an arithmetic number, because the mean of its divisors is an integer number (5215245).

Almost surely, 2^22251704 is an apocalyptic number.

It is an amenable number.

22251704 is a deficient number, since it is larger than the sum of its proper divisors (19470256).

22251704 is a wasteful number, since it uses less digits than its factorization.

22251704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781469 (or 2781465 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 22251704 is about 4717.1711862090. The cubic root of 22251704 is about 281.2684962980.

Adding to 22251704 its reverse (40715222), we get a palindrome (62966926).

The spelling of 22251704 in words is "twenty-two million, two hundred fifty-one thousand, seven hundred four".