22051724 has 12 divisors (see below), whose sum is σ = 38932824. Its totient is φ = 10928064.

The previous prime is 22051721. The next prime is 22051739. The reversal of 22051724 is 42715022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22051724.

It is not an unprimeable number, because it can be changed into a prime (22051721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23942 + ... + 24845.

It is an arithmetic number, because the mean of its divisors is an integer number (3244402).

Almost surely, 2^22051724 is an apocalyptic number.

It is an amenable number.

22051724 is a deficient number, since it is larger than the sum of its proper divisors (16881100).

22051724 is a wasteful number, since it uses less digits than its factorization.

22051724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48904 (or 48902 counting only the distinct ones).

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

The square root of 22051724 is about 4695.9263196945. The cubic root of 22051724 is about 280.4233561673.

Adding to 22051724 its reverse (42715022), we get a palindrome (64766746).

The spelling of 22051724 in words is "twenty-two million, fifty-one thousand, seven hundred twenty-four".