215423221050 has 144 divisors (see below), whose sum is σ = 594548285760. Its totient is φ = 55890616320.

The previous prime is 215423221031. The next prime is 215423221087. The reversal of 215423221050 is 50122324512.

215423221050 is a `hidden beast` number, since 2 + 15 + 423 + 221 + 0 + 5 + 0 = 666.

215423221050 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4951291 + ... + 4994609.

It is an arithmetic number, because the mean of its divisors is an integer number (4128807540).

Almost surely, 2^215423221050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215423221050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297274142880).

215423221050 is an abundant number, since it is smaller than the sum of its proper divisors (379125064710).

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

215423221050 is a wasteful number, since it uses less digits than its factorization.

215423221050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43637 (or 43629 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 215423221050 its reverse (50122324512), we get a palindrome (265545545562).

The spelling of 215423221050 in words is "two hundred fifteen billion, four hundred twenty-three million, two hundred twenty-one thousand, fifty".