16238081 has 2 divisors, whose sum is σ = 16238082. Its totient is φ = 16238080.

The previous prime is 16238063. The next prime is 16238083. The reversal of 16238081 is 18083261.

16238081 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., 12567025 + 3671056 = 3545^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 16238081 - 2¹⁴ = 16221697 is a prime.

It is a super-2 number, since 2×16238081² = 527350549125122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 16238083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16238083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8119040 + 8119041.

It is an arithmetic number, because the mean of its divisors is an integer number (8119041).

Almost surely, 2^16238081 is an apocalyptic number.

It is an amenable number.

16238081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16238081 is an equidigital number, since it uses as much as digits as its factorization.

16238081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 16238081 is about 4029.6502329607. The cubic root of 16238081 is about 253.2279083879.

The spelling of 16238081 in words is "sixteen million, two hundred thirty-eight thousand, eighty-one".