221224324425 has 96 divisors (see below), whose sum is σ = 398309673216. Its totient is φ = 107692416000.

The previous prime is 221224324397. The next prime is 221224324429. The reversal of 221224324425 is 524423422122.

It is not a de Polignac number, because 221224324425 - 2⁷ = 221224324297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221224324429) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 94498755 + ... + 94501095.

It is an arithmetic number, because the mean of its divisors is an integer number (4149059096).

Almost surely, 2^221224324425 is an apocalyptic number.

221224324425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221224324425 is a deficient number, since it is larger than the sum of its proper divisors (177085348791).

221224324425 is a wasteful number, since it uses less digits than its factorization.

221224324425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411 (or 3406 counting only the distinct ones).

The product of its digits is 61440, while the sum is 33.

Adding to 221224324425 its reverse (524423422122), we get a palindrome (745647746547).

The spelling of 221224324425 in words is "two hundred twenty-one billion, two hundred twenty-four million, three hundred twenty-four thousand, four hundred twenty-five".