16056181 has 2 divisors, whose sum is σ = 16056182. Its totient is φ = 16056180.

The previous prime is 16056163. The next prime is 16056193. The reversal of 16056181 is 18165061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14516100 + 1540081 = 3810^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 16056181 - 2⁵ = 16056149 is a prime.

It is a super-3 number, since 3×16056181³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16056581) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8028090 + 8028091.

It is an arithmetic number, because the mean of its divisors is an integer number (8028091).

Almost surely, 2^16056181 is an apocalyptic number.

It is an amenable number.

16056181 is a deficient number, since it is larger than the sum of its proper divisors (1).

16056181 is an equidigital number, since it uses as much as digits as its factorization.

16056181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 16056181 is about 4007.0164711416. The cubic root of 16056181 is about 252.2787972204.

The spelling of 16056181 in words is "sixteen million, fifty-six thousand, one hundred eighty-one".