221425524050500 has 384 divisors, whose sum is σ = 638491087503360. Its totient is φ = 64945463040000.

The previous prime is 221425524050477. The next prime is 221425524050581. The reversal of 221425524050500 is 5050425524122.

It is a self number, because there is not a number n which added to its sum of digits gives 221425524050500.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4633181605 + ... + 4633229395.

It is an arithmetic number, because the mean of its divisors is an integer number (1662737207040).

Almost surely, 2^{221425524050500} is an apocalyptic number.

221425524050500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221425524050500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319245543751680).

221425524050500 is an abundant number, since it is smaller than the sum of its proper divisors (417065563452860).

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

221425524050500 is a wasteful number, since it uses less digits than its factorization.

221425524050500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54924 (or 54912 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 221425524050500 its reverse (5050425524122), we get a palindrome (226475949574622).

The spelling of 221425524050500 in words is "two hundred twenty-one trillion, four hundred twenty-five billion, five hundred twenty-four million, fifty thousand, five hundred".