2565122136 has 16 divisors (see below), whose sum is σ = 6412805400. Its totient is φ = 855040704.

The previous prime is 2565122117. The next prime is 2565122137. The reversal of 2565122136 is 6312215652.

It is a junction number, because it is equal to n+sod(n) for n = 2565122097 and 2565122106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565122137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53440021 + ... + 53440068.

Almost surely, 2^2565122136 is an apocalyptic number.

It is an amenable number.

2565122136 is an abundant number, since it is smaller than the sum of its proper divisors (3847683264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565122136 is a wasteful number, since it uses less digits than its factorization.

2565122136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106880098 (or 106880094 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 2565122136 is about 50647.0348194245. The cubic root of 2565122136 is about 1368.8925171592.

Adding to 2565122136 its reverse (6312215652), we get a palindrome (8877337788).

The spelling of 2565122136 in words is "two billion, five hundred sixty-five million, one hundred twenty-two thousand, one hundred thirty-six".