2565171025 has 48 divisors (see below), whose sum is σ = 3419781120. Its totient is φ = 1904302400.

The previous prime is 2565171023. The next prime is 2565171041. The reversal of 2565171025 is 5201715652.

2565171025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2565171025 - 2¹ = 2565171023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2565171023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2815320 + ... + 2816230.

It is an arithmetic number, because the mean of its divisors is an integer number (71245440).

Almost surely, 2^2565171025 is an apocalyptic number.

2565171025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565171025 is a deficient number, since it is larger than the sum of its proper divisors (854610095).

2565171025 is a wasteful number, since it uses less digits than its factorization.

2565171025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 2565171025 is about 50647.5174613722. The cubic root of 2565171025 is about 1368.9012137381.

Adding to 2565171025 its reverse (5201715652), we get a palindrome (7766886677).

The spelling of 2565171025 in words is "two billion, five hundred sixty-five million, one hundred seventy-one thousand, twenty-five".