2565323071 has 4 divisors (see below), whose sum is σ = 2571114312. Its totient is φ = 2559531832.

The previous prime is 2565323051. The next prime is 2565323077. The reversal of 2565323071 is 1703235652.

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 2565323071 - 2⁵ = 2565323039 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 (2565323077) 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, 2894956 + ... + 2895841.

It is an arithmetic number, because the mean of its divisors is an integer number (642778578).

Almost surely, 2^2565323071 is an apocalyptic number.

2565323071 is a deficient number, since it is larger than the sum of its proper divisors (5791241).

2565323071 is an equidigital number, since it uses as much as digits as its factorization.

2565323071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791240.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 2565323071 is about 50649.0184603808. The cubic root of 2565323071 is about 1368.9282596075.

The spelling of 2565323071 in words is "two billion, five hundred sixty-five million, three hundred twenty-three thousand, seventy-one".