325731881 has 2 divisors, whose sum is σ = 325731882. Its totient is φ = 325731880.

The previous prime is 325731871. The next prime is 325731919. The reversal of 325731881 is 188137523.

It is a happy number.

It is an a-pointer prime, because the next prime (325731919) can be obtained adding 325731881 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324576256 + 1155625 = 18016^2 + 1075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-325731881 is a prime.

It is a super-2 number, since 2×325731881² = 212202516599596322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (325731841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162865940 + 162865941.

It is an arithmetic number, because the mean of its divisors is an integer number (162865941).

Almost surely, 2^325731881 is an apocalyptic number.

It is an amenable number.

325731881 is a deficient number, since it is larger than the sum of its proper divisors (1).

325731881 is an equidigital number, since it uses as much as digits as its factorization.

325731881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 325731881 is about 18048.0436889985. The cubic root of 325731881 is about 688.0501423985.

The spelling of 325731881 in words is "three hundred twenty-five million, seven hundred thirty-one thousand, eight hundred eighty-one".