5172115261 has 2 divisors, whose sum is σ = 5172115262. Its totient is φ = 5172115260.

The previous prime is 5172115253. The next prime is 5172115297. The reversal of 5172115261 is 1625112715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3822948900 + 1349166361 = 61830^2 + 36731^2 .

It is a cyclic number.

It is not a de Polignac number, because 5172115261 - 2³ = 5172115253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5172115661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2586057630 + 2586057631.

It is an arithmetic number, because the mean of its divisors is an integer number (2586057631).

Almost surely, 2^5172115261 is an apocalyptic number.

It is an amenable number.

5172115261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5172115261 is an equidigital number, since it uses as much as digits as its factorization.

5172115261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 31.

The square root of 5172115261 is about 71917.4197326350. The cubic root of 5172115261 is about 1729.3758828809.

Adding to 5172115261 its reverse (1625112715), we get a palindrome (6797227976).

The spelling of 5172115261 in words is "five billion, one hundred seventy-two million, one hundred fifteen thousand, two hundred sixty-one".