16325381 has 2 divisors, whose sum is σ = 16325382. Its totient is φ = 16325380.

The previous prime is 16325329. The next prime is 16325383. The reversal of 16325381 is 18352361.

16325381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 7474756 = 2975^2 + 2734^2 .

It is an emirp because it is prime and its reverse (18352361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16325381 is a prime.

It is a super-2 number, since 2×16325381² = 533036129590322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 16325383, it forms a pair of twin primes.

It is a Chen 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 (16325383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8162690 + 8162691.

It is an arithmetic number, because the mean of its divisors is an integer number (8162691).

Almost surely, 2^16325381 is an apocalyptic number.

It is an amenable number.

16325381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16325381 is an equidigital number, since it uses as much as digits as its factorization.

16325381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 16325381 is about 4040.4679184471. The cubic root of 16325381 is about 253.6809031533.

The spelling of 16325381 in words is "sixteen million, three hundred twenty-five thousand, three hundred eighty-one".