2916181 has 2 divisors, whose sum is σ = 2916182. Its totient is φ = 2916180.

The previous prime is 2916169. The next prime is 2916203. The reversal of 2916181 is 1816192.

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., 2775556 + 140625 = 1666^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2916181 - 2⁵ = 2916149 is a prime.

It is a super-2 number, since 2×2916181² = 17008223249522, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2916161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1458090 + 1458091.

It is an arithmetic number, because the mean of its divisors is an integer number (1458091).

2^2916181 is an apocalyptic number.

It is an amenable number.

2916181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2916181 is an equidigital number, since it uses as much as digits as its factorization.

2916181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

The square root of 2916181 is about 1707.6829330997. The cubic root of 2916181 is about 142.8690505788.

The spelling of 2916181 in words is "two million, nine hundred sixteen thousand, one hundred eighty-one".