5616181 has 2 divisors, whose sum is σ = 5616182. Its totient is φ = 5616180.

The previous prime is 5616161. The next prime is 5616197. The reversal of 5616181 is 1816165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5597956 + 18225 = 2366^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 5616181 - 2⁹ = 5615669 is a prime.

It is a super-2 number, since 2×5616181² = 63082978049522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

5616181 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5616131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2808090 + 2808091.

It is an arithmetic number, because the mean of its divisors is an integer number (2808091).

Almost surely, 2^5616181 is an apocalyptic number.

It is an amenable number.

5616181 is a deficient number, since it is larger than the sum of its proper divisors (1).

5616181 is an equidigital number, since it uses as much as digits as its factorization.

5616181 is an evil number, because the sum of its binary digits is even.

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

The square root of 5616181 is about 2369.8483073817. The cubic root of 5616181 is about 177.7516736701.

The spelling of 5616181 in words is "five million, six hundred sixteen thousand, one hundred eighty-one".