325013219981 has 2 divisors, whose sum is σ = 325013219982. Its totient is φ = 325013219980.

The previous prime is 325013219963. The next prime is 325013220067. The reversal of 325013219981 is 189912310523.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324775751881 + 237468100 = 569891^2 + 15410^2 .

It is a cyclic number.

It is not a de Polignac number, because 325013219981 - 2¹⁸ = 325012957837 is a prime.

It is a super-2 number, since 2×325013219981² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325013219911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162506609990 + 162506609991.

It is an arithmetic number, because the mean of its divisors is an integer number (162506609991).

Almost surely, 2^325013219981 is an apocalyptic number.

It is an amenable number.

325013219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

325013219981 is an equidigital number, since it uses as much as digits as its factorization.

325013219981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 325013219981 in words is "three hundred twenty-five billion, thirteen million, two hundred nineteen thousand, nine hundred eighty-one".