325345021 has 2 divisors, whose sum is σ = 325345022. Its totient is φ = 325345020.

The previous prime is 325345019. The next prime is 325345039. The reversal of 325345021 is 120543523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235284921 + 90060100 = 15339^2 + 9490^2 .

It is a cyclic number.

It is not a de Polignac number, because 325345021 - 2¹ = 325345019 is a prime.

Together with 325345019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325345061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162672510 + 162672511.

It is an arithmetic number, because the mean of its divisors is an integer number (162672511).

Almost surely, 2^325345021 is an apocalyptic number.

It is an amenable number.

325345021 is a deficient number, since it is larger than the sum of its proper divisors (1).

325345021 is an equidigital number, since it uses as much as digits as its factorization.

325345021 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 325345021 is about 18037.3229998246. The cubic root of 325345021 is about 687.7776437165. Note that the first 3 decimals are identical.

Adding to 325345021 its reverse (120543523), we get a palindrome (445888544).

The spelling of 325345021 in words is "three hundred twenty-five million, three hundred forty-five thousand, twenty-one".