2565422423 has 4 divisors (see below), whose sum is σ = 2566232088. Its totient is φ = 2564612760.

The previous prime is 2565422411. The next prime is 2565422459. The reversal of 2565422423 is 3242245652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565422423 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 (2565422023) 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, 400061 + ... + 406422.

It is an arithmetic number, because the mean of its divisors is an integer number (641558022).

Almost surely, 2^2565422423 is an apocalyptic number.

2565422423 is a deficient number, since it is larger than the sum of its proper divisors (809665).

2565422423 is an equidigital number, since it uses as much as digits as its factorization.

2565422423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809664.

The product of its digits is 115200, while the sum is 35.

The square root of 2565422423 is about 50649.9992398815. Note that the first 3 decimals coincide. The cubic root of 2565422423 is about 1368.9459317163.

The spelling of 2565422423 in words is "two billion, five hundred sixty-five million, four hundred twenty-two thousand, four hundred twenty-three".