221330424450 has 24 divisors (see below), whose sum is σ = 548899453008. Its totient is φ = 59021446480.

The previous prime is 221330424443. The next prime is 221330424451. The reversal of 221330424450 is 54424033122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (221330424451) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 737767932 + ... + 737768231.

It is an arithmetic number, because the mean of its divisors is an integer number (22870810542).

Almost surely, 2^221330424450 is an apocalyptic number.

221330424450 is an abundant number, since it is smaller than the sum of its proper divisors (327569028558).

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

221330424450 is a wasteful number, since it uses less digits than its factorization.

221330424450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475536178 (or 1475536173 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 221330424450 its reverse (54424033122), we get a palindrome (275754457572).

The spelling of 221330424450 in words is "two hundred twenty-one billion, three hundred thirty million, four hundred twenty-four thousand, four hundred fifty".