5161381 has 2 divisors, whose sum is σ = 5161382. Its totient is φ = 5161380.

The previous prime is 5161363. The next prime is 5161411. The reversal of 5161381 is 1831615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4268356 + 893025 = 2066^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161381 - 2⁵ = 5161349 is a prime.

It is a super-2 number, since 2×5161381² = 53279707654322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5161181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2580690 + 2580691.

It is an arithmetic number, because the mean of its divisors is an integer number (2580691).

Almost surely, 2^5161381 is an apocalyptic number.

It is an amenable number.

5161381 is a deficient number, since it is larger than the sum of its proper divisors (1).

5161381 is an equidigital number, since it uses as much as digits as its factorization.

5161381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 25.

The square root of 5161381 is about 2271.8672936596. The cubic root of 5161381 is about 172.8178666118.

Adding to 5161381 its reverse (1831615), we get a palindrome (6992996).

The spelling of 5161381 in words is "five million, one hundred sixty-one thousand, three hundred eighty-one".