22151721233824 has 192 divisors, whose sum is σ = 55505327431680. Its totient is φ = 8465547893760.

The previous prime is 22151721233819. The next prime is 22151721233893. The reversal of 22151721233824 is 42833212715122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50605207 + ... + 51041065.

It is an arithmetic number, because the mean of its divisors is an integer number (289090247040).

Almost surely, 2^{22151721233824} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22151721233824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27752663715840).

22151721233824 is an abundant number, since it is smaller than the sum of its proper divisors (33353606197856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22151721233824 is a wasteful number, since it uses less digits than its factorization.

22151721233824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436483 (or 436475 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

Adding to 22151721233824 its reverse (42833212715122), we get a palindrome (64984933948946).

The spelling of 22151721233824 in words is "twenty-two trillion, one hundred fifty-one billion, seven hundred twenty-one million, two hundred thirty-three thousand, eight hundred twenty-four".