221413225225 has 12 divisors (see below), whose sum is σ = 274564658880. Its totient is φ = 177122670800.

The previous prime is 221413225207. The next prime is 221413225279. The reversal of 221413225225 is 522522314122.

It is not a de Polignac number, because 221413225225 - 2⁷ = 221413225097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409956 + ... + 781594.

It is an arithmetic number, because the mean of its divisors is an integer number (22880388240).

Almost surely, 2^221413225225 is an apocalyptic number.

221413225225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221413225225 is a deficient number, since it is larger than the sum of its proper divisors (53151433655).

221413225225 is a wasteful number, since it uses less digits than its factorization.

221413225225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395480 (or 395475 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

Adding to 221413225225 its reverse (522522314122), we get a palindrome (743935539347).

The spelling of 221413225225 in words is "two hundred twenty-one billion, four hundred thirteen million, two hundred twenty-five thousand, two hundred twenty-five".