221234445344 has 96 divisors (see below), whose sum is σ = 521905628160. Its totient is φ = 91126252800.

The previous prime is 221234445331. The next prime is 221234445347. The reversal of 221234445344 is 443544432122.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 221234445298 and 221234445307.

It is not an unprimeable number, because it can be changed into a prime (221234445347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565292 + ... + 872939.

It is an arithmetic number, because the mean of its divisors is an integer number (5436516960).

Almost surely, 2^221234445344 is an apocalyptic number.

It is an amenable number.

221234445344 is an abundant number, since it is smaller than the sum of its proper divisors (300671182816).

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

221234445344 is a wasteful number, since it uses less digits than its factorization.

221234445344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438294 (or 1438286 counting only the distinct ones).

The product of its digits is 368640, while the sum is 38.

Adding to 221234445344 its reverse (443544432122), we get a palindrome (664778877466).

The spelling of 221234445344 in words is "two hundred twenty-one billion, two hundred thirty-four million, four hundred forty-five thousand, three hundred forty-four".