2564542271 has 4 divisors (see below), whose sum is σ = 2699518200. Its totient is φ = 2429566344.

The previous prime is 2564542247. The next prime is 2564542303. The reversal of 2564542271 is 1722454652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2564542271 - 2¹⁸ = 2564280127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564542241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67487936 + ... + 67487973.

It is an arithmetic number, because the mean of its divisors is an integer number (674879550).

Almost surely, 2^2564542271 is an apocalyptic number.

2564542271 is a deficient number, since it is larger than the sum of its proper divisors (134975929).

2564542271 is a wasteful number, since it uses less digits than its factorization.

2564542271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134975928.

The product of its digits is 134400, while the sum is 38.

The square root of 2564542271 is about 50641.3099257908. The cubic root of 2564542271 is about 1368.7893599296.

The spelling of 2564542271 in words is "two billion, five hundred sixty-four million, five hundred forty-two thousand, two hundred seventy-one".