5181881 has 2 divisors, whose sum is σ = 5181882. Its totient is φ = 5181880.

The previous prime is 5181859. The next prime is 5181893. The reversal of 5181881 is 1881815.

5181881 is digitally balanced in base 3, 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., 3644281 + 1537600 = 1909^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 5181881 - 2⁶ = 5181817 is a prime.

It is a super-2 number, since 2×5181881² = 53703781396322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5181811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590940 + 2590941.

It is an arithmetic number, because the mean of its divisors is an integer number (2590941).

Almost surely, 2^5181881 is an apocalyptic number.

It is an amenable number.

5181881 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181881 is an equidigital number, since it uses as much as digits as its factorization.

5181881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 32.

The square root of 5181881 is about 2276.3745298171. The cubic root of 5181881 is about 173.0463639975.

The spelling of 5181881 in words is "five million, one hundred eighty-one thousand, eight hundred eighty-one".