325543021 has 2 divisors, whose sum is σ = 325543022. Its totient is φ = 325543020.

The previous prime is 325542977. The next prime is 325543051. The reversal of 325543021 is 120345523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227255625 + 98287396 = 15075^2 + 9914^2 .

It is an emirp because it is prime and its reverse (120345523) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 325543021 - 2¹⁵ = 325510253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325543051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162771510 + 162771511.

It is an arithmetic number, because the mean of its divisors is an integer number (162771511).

Almost surely, 2^325543021 is an apocalyptic number.

It is an amenable number.

325543021 is a deficient number, since it is larger than the sum of its proper divisors (1).

325543021 is an equidigital number, since it uses as much as digits as its factorization.

325543021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 325543021 is about 18042.8107843540. The cubic root of 325543021 is about 687.9171390710.

Adding to 325543021 its reverse (120345523), we get a palindrome (445888544).

The spelling of 325543021 in words is "three hundred twenty-five million, five hundred forty-three thousand, twenty-one".