325613221 has 4 divisors (see below), whose sum is σ = 325940812. Its totient is φ = 325285632.

The previous prime is 325613219. The next prime is 325613263. The reversal of 325613221 is 122316523.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122316523 = 7 ⋅17473789.

It can be written as a sum of positive squares in 2 ways, for example, as 296872900 + 28740321 = 17230^2 + 5361^2 .

It is a cyclic number.

It is not a de Polignac number, because 325613221 - 2¹ = 325613219 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 (325613521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162300 + ... + 164293.

It is an arithmetic number, because the mean of its divisors is an integer number (81485203).

Almost surely, 2^325613221 is an apocalyptic number.

It is an amenable number.

325613221 is a deficient number, since it is larger than the sum of its proper divisors (327591).

325613221 is an equidigital number, since it uses as much as digits as its factorization.

325613221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327590.

The product of its digits is 2160, while the sum is 25.

The square root of 325613221 is about 18044.7560526597. The cubic root of 325613221 is about 687.9665829328.

Adding to 325613221 its reverse (122316523), we get a palindrome (447929744).

The spelling of 325613221 in words is "three hundred twenty-five million, six hundred thirteen thousand, two hundred twenty-one".