5181641 has 2 divisors, whose sum is σ = 5181642. Its totient is φ = 5181640.

The previous prime is 5181637. The next prime is 5181653. The reversal of 5181641 is 1461815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4494400 + 687241 = 2120^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 5181641 - 2² = 5181637 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5181641.

It is not a weakly prime, because it can be changed into another prime (5181611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590820 + 2590821.

It is an arithmetic number, because the mean of its divisors is an integer number (2590821).

Almost surely, 2^5181641 is an apocalyptic number.

It is an amenable number.

5181641 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181641 is an equidigital number, since it uses as much as digits as its factorization.

5181641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 5181641 is about 2276.3218138040. The cubic root of 5181641 is about 173.0436923957.

The spelling of 5181641 in words is "five million, one hundred eighty-one thousand, six hundred forty-one".