2563172173 has 2 divisors, whose sum is σ = 2563172174. Its totient is φ = 2563172172.

The previous prime is 2563172159. The next prime is 2563172177. The reversal of 2563172173 is 3712713652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2528279524 + 34892649 = 50282^2 + 5907^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563172173 - 2²⁹ = 2026301261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2563172177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281586086 + 1281586087.

It is an arithmetic number, because the mean of its divisors is an integer number (1281586087).

Almost surely, 2^2563172173 is an apocalyptic number.

It is an amenable number.

2563172173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563172173 is an equidigital number, since it uses as much as digits as its factorization.

2563172173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 2563172173 is about 50627.7806446224. The cubic root of 2563172173 is about 1368.5455594854.

The spelling of 2563172173 in words is "two billion, five hundred sixty-three million, one hundred seventy-two thousand, one hundred seventy-three".