21223230562 has 32 divisors (see below), whose sum is σ = 32902120944. Its totient is φ = 10259712000.

The previous prime is 21223230557. The next prime is 21223230577. The reversal of 21223230562 is 26503232212.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 20586223441 + 637007121 = 143479^2 + 25239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21223230562.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8693262 + ... + 8695702.

Almost surely, 2^21223230562 is an apocalyptic number.

21223230562 is a deficient number, since it is larger than the sum of its proper divisors (11678890382).

21223230562 is a wasteful number, since it uses less digits than its factorization.

21223230562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21223230562 its reverse (26503232212), we get a palindrome (47726462774).

The spelling of 21223230562 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty thousand, five hundred sixty-two".