5165402161 has 2 divisors, whose sum is σ = 5165402162. Its totient is φ = 5165402160.

The previous prime is 5165402159. The next prime is 5165402171. The reversal of 5165402161 is 1612045615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3530736400 + 1634665761 = 59420^2 + 40431^2 .

It is a cyclic number.

It is not a de Polignac number, because 5165402161 - 2¹ = 5165402159 is a prime.

Together with 5165402159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5165402141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2582701080 + 2582701081.

It is an arithmetic number, because the mean of its divisors is an integer number (2582701081).

Almost surely, 2^5165402161 is an apocalyptic number.

It is an amenable number.

5165402161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5165402161 is an equidigital number, since it uses as much as digits as its factorization.

5165402161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 5165402161 is about 71870.7322976467. The cubic root of 5165402161 is about 1728.6273496998.

Adding to 5165402161 its reverse (1612045615), we get a palindrome (6777447776).

The spelling of 5165402161 in words is "five billion, one hundred sixty-five million, four hundred two thousand, one hundred sixty-one".