2565225651 has 8 divisors (see below), whose sum is σ = 3512741584. Its totient is φ = 1663930080.

The previous prime is 2565225647. The next prime is 2565225661. The reversal of 2565225651 is 1565225652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2565225651 - 2² = 2565225647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565225601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11554960 + ... + 11555181.

It is an arithmetic number, because the mean of its divisors is an integer number (439092698).

Almost surely, 2^2565225651 is an apocalyptic number.

2565225651 is a deficient number, since it is larger than the sum of its proper divisors (947515933).

2565225651 is a wasteful number, since it uses less digits than its factorization.

2565225651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23110181.

The product of its digits is 180000, while the sum is 39.

The square root of 2565225651 is about 50648.0567346863. The cubic root of 2565225651 is about 1368.9109307077.

Subtracting from 2565225651 its reverse (1565225652), we obtain a palindrome (999999999).

The spelling of 2565225651 in words is "two billion, five hundred sixty-five million, two hundred twenty-five thousand, six hundred fifty-one".