221266325 has 24 divisors (see below), whose sum is σ = 327205248. Its totient is φ = 145126080.

The previous prime is 221266321. The next prime is 221266333. The reversal of 221266325 is 523662122.

It is not a de Polignac number, because 221266325 - 2² = 221266321 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221266321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23462 + ... + 31511.

It is an arithmetic number, because the mean of its divisors is an integer number (13633552).

Almost surely, 2^221266325 is an apocalyptic number.

221266325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221266325 is a deficient number, since it is larger than the sum of its proper divisors (105938923).

221266325 is a wasteful number, since it uses less digits than its factorization.

221266325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55013 (or 55008 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 221266325 is about 14875.0235293932. The cubic root of 221266325 is about 604.8371257482.

The spelling of 221266325 in words is "two hundred twenty-one million, two hundred sixty-six thousand, three hundred twenty-five".