21544322225050 has 12 divisors (see below), whose sum is σ = 40072439338686. Its totient is φ = 8617728890000.

The previous prime is 21544322224973. The next prime is 21544322225051. The reversal of 21544322225050 is 5052222344512.

It can be written as a sum of positive squares in 3 ways, for example, as 14425495244281 + 7118826980769 = 3798091^2 + 2668113^2 .

It is not an unprimeable number, because it can be changed into a prime (21544322225051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215443222201 + ... + 215443222300.

Almost surely, 2^{21544322225050} is an apocalyptic number.

21544322225050 is a deficient number, since it is larger than the sum of its proper divisors (18528117113636).

21544322225050 is a wasteful number, since it uses less digits than its factorization.

21544322225050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430886444513 (or 430886444508 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 21544322225050 its reverse (5052222344512), we get a palindrome (26596544569562).

The spelling of 21544322225050 in words is "twenty-one trillion, five hundred forty-four billion, three hundred twenty-two million, two hundred twenty-five thousand, fifty".