324541981 has 2 divisors, whose sum is σ = 324541982. Its totient is φ = 324541980.

The previous prime is 324541967. The next prime is 324541991. The reversal of 324541981 is 189145423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312228900 + 12313081 = 17670^2 + 3509^2 .

It is a cyclic number.

It is not a de Polignac number, because 324541981 - 2¹¹ = 324539933 is a prime.

It is a super-2 number, since 2×324541981² = 210654994862808722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 324541981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324541961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162270990 + 162270991.

It is an arithmetic number, because the mean of its divisors is an integer number (162270991).

Almost surely, 2^324541981 is an apocalyptic number.

It is an amenable number.

324541981 is a deficient number, since it is larger than the sum of its proper divisors (1).

324541981 is an equidigital number, since it uses as much as digits as its factorization.

324541981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 324541981 is about 18015.0487370975. The cubic root of 324541981 is about 687.2113034039.

The spelling of 324541981 in words is "three hundred twenty-four million, five hundred forty-one thousand, nine hundred eighty-one".