221207325 has 24 divisors (see below), whose sum is σ = 369098400. Its totient is φ = 116890560.

The previous prime is 221207321. The next prime is 221207339. The reversal of 221207325 is 523702122.

It is a happy number.

It is not a de Polignac number, because 221207325 - 2² = 221207321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221207295 and 221207304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221207321) 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, 5355 + ... + 21704.

It is an arithmetic number, because the mean of its divisors is an integer number (15379100).

Almost surely, 2^221207325 is an apocalyptic number.

221207325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221207325 is a deficient number, since it is larger than the sum of its proper divisors (147891075).

221207325 is a wasteful number, since it uses less digits than its factorization.

221207325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27181 (or 27176 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 221207325 is about 14873.0402070323. The cubic root of 221207325 is about 604.7833616358.

Adding to 221207325 its reverse (523702122), we get a palindrome (744909447).

The spelling of 221207325 in words is "two hundred twenty-one million, two hundred seven thousand, three hundred twenty-five".