2565225647 has 2 divisors, whose sum is σ = 2565225648. Its totient is φ = 2565225646.

The previous prime is 2565225631. The next prime is 2565225661. The reversal of 2565225647 is 7465225652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2565225647 - 2⁴ = 2565225631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2565225598 and 2565225607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565225697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282612823 + 1282612824.

It is an arithmetic number, because the mean of its divisors is an integer number (1282612824).

Almost surely, 2^2565225647 is an apocalyptic number.

2565225647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565225647 is an equidigital number, since it uses as much as digits as its factorization.

2565225647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 44.

The square root of 2565225647 is about 50648.0566951981. The cubic root of 2565225647 is about 1368.9109299962.

The spelling of 2565225647 in words is "two billion, five hundred sixty-five million, two hundred twenty-five thousand, six hundred forty-seven".