325230721 has 2 divisors, whose sum is σ = 325230722. Its totient is φ = 325230720.

The previous prime is 325230713. The next prime is 325230743. The reversal of 325230721 is 127032523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320231025 + 4999696 = 17895^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 325230721 - 2³ = 325230713 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (325230701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162615360 + 162615361.

It is an arithmetic number, because the mean of its divisors is an integer number (162615361).

Almost surely, 2^325230721 is an apocalyptic number.

It is an amenable number.

325230721 is a deficient number, since it is larger than the sum of its proper divisors (1).

325230721 is an equidigital number, since it uses as much as digits as its factorization.

325230721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 325230721 is about 18034.1542912331. The cubic root of 325230721 is about 687.6970910852.

The spelling of 325230721 in words is "three hundred twenty-five million, two hundred thirty thousand, seven hundred twenty-one".