2565281603 has 2 divisors, whose sum is σ = 2565281604. Its totient is φ = 2565281602.

The previous prime is 2565281569. The next prime is 2565281627. The reversal of 2565281603 is 3061825652.

2565281603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2565281603 - 2²⁶ = 2498172739 is a prime.

It is not a weakly prime, because it can be changed into another prime (2565281683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282640801 + 1282640802.

It is an arithmetic number, because the mean of its divisors is an integer number (1282640802).

Almost surely, 2^2565281603 is an apocalyptic number.

2565281603 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565281603 is an equidigital number, since it uses as much as digits as its factorization.

2565281603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 2565281603 is about 50648.6090924519. The cubic root of 2565281603 is about 1368.9208834056.

The spelling of 2565281603 in words is "two billion, five hundred sixty-five million, two hundred eighty-one thousand, six hundred three".