221011325 has 24 divisors (see below), whose sum is σ = 293954400. Its totient is φ = 164324160.

The previous prime is 221011319. The next prime is 221011327. The reversal of 221011325 is 523110122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-221011325 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011327) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 20786 + ... + 29564.

It is an arithmetic number, because the mean of its divisors is an integer number (12248100).

Almost surely, 2^221011325 is an apocalyptic number.

221011325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221011325 is a deficient number, since it is larger than the sum of its proper divisors (72943075).

221011325 is a wasteful number, since it uses less digits than its factorization.

221011325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8861 (or 8856 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221011325 is about 14866.4496434085. The cubic root of 221011325 is about 604.6046867719.

Adding to 221011325 its reverse (523110122), we get a palindrome (744121447).

The spelling of 221011325 in words is "two hundred twenty-one million, eleven thousand, three hundred twenty-five".