325187321 has 2 divisors, whose sum is σ = 325187322. Its totient is φ = 325187320.

The previous prime is 325187287. The next prime is 325187327. The reversal of 325187321 is 123781523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322741225 + 2446096 = 17965^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 325187321 - 2²² = 320993017 is a prime.

It is a super-4 number, since 4×325187321⁴ (a number of 35 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (325187327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162593660 + 162593661.

It is an arithmetic number, because the mean of its divisors is an integer number (162593661).

Almost surely, 2^325187321 is an apocalyptic number.

It is an amenable number.

325187321 is a deficient number, since it is larger than the sum of its proper divisors (1).

325187321 is an equidigital number, since it uses as much as digits as its factorization.

325187321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 325187321 is about 18032.9509786945. The cubic root of 325187321 is about 687.6665001032. Note that the first 3 decimals are identical.

The spelling of 325187321 in words is "three hundred twenty-five million, one hundred eighty-seven thousand, three hundred twenty-one".