221244125 has 16 divisors (see below), whose sum is σ = 276744000. Its totient is φ = 176590800.

The previous prime is 221244097. The next prime is 221244173. The reversal of 221244125 is 521442122.

It is not a de Polignac number, because 221244125 - 2¹⁰ = 221243101 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221244125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60602 + ... + 64148.

It is an arithmetic number, because the mean of its divisors is an integer number (17296500).

Almost surely, 2^221244125 is an apocalyptic number.

221244125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221244125 is a deficient number, since it is larger than the sum of its proper divisors (55499875).

221244125 is an equidigital number, since it uses as much as digits as its factorization.

221244125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061 (or 4051 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 221244125 is about 14874.2772933679. The cubic root of 221244125 is about 604.8168969835.

Adding to 221244125 its reverse (521442122), we get a palindrome (742686247).

The spelling of 221244125 in words is "two hundred twenty-one million, two hundred forty-four thousand, one hundred twenty-five".