5201561917 has 2 divisors, whose sum is σ = 5201561918. Its totient is φ = 5201561916.

The previous prime is 5201561909. The next prime is 5201561921. The reversal of 5201561917 is 7191651025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4985207236 + 216354681 = 70606^2 + 14709^2 .

It is a cyclic number.

It is not a de Polignac number, because 5201561917 - 2³ = 5201561909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5201561977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600780958 + 2600780959.

It is an arithmetic number, because the mean of its divisors is an integer number (2600780959).

Almost surely, 2^5201561917 is an apocalyptic number.

It is an amenable number.

5201561917 is a deficient number, since it is larger than the sum of its proper divisors (1).

5201561917 is an equidigital number, since it uses as much as digits as its factorization.

5201561917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 37.

The square root of 5201561917 is about 72121.8546419877. The cubic root of 5201561917 is about 1732.6516540333.

The spelling of 5201561917 in words is "five billion, two hundred one million, five hundred sixty-one thousand, nine hundred seventeen".