5131240217 has 2 divisors, whose sum is σ = 5131240218. Its totient is φ = 5131240216.

The previous prime is 5131240211. The next prime is 5131240229. The reversal of 5131240217 is 7120421315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2924213776 + 2207026441 = 54076^2 + 46979^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131240217 - 2²⁰ = 5130191641 is a prime.

It is not a weakly prime, because it can be changed into another prime (5131240211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565620108 + 2565620109.

It is an arithmetic number, because the mean of its divisors is an integer number (2565620109).

Almost surely, 2^5131240217 is an apocalyptic number.

It is an amenable number.

5131240217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5131240217 is an equidigital number, since it uses as much as digits as its factorization.

5131240217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 5131240217 is about 71632.6756236286. The cubic root of 5131240217 is about 1724.8080964982.

The spelling of 5131240217 in words is "five billion, one hundred thirty-one million, two hundred forty thousand, two hundred seventeen".