2565020232251 has 4 divisors (see below), whose sum is σ = 2572286578872. Its totient is φ = 2557753885632.

The previous prime is 2565020232211. The next prime is 2565020232311. The reversal of 2565020232251 is 1522320205652.

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

It is a cyclic number.

It is not a de Polignac number, because 2565020232251 - 2³⁸ = 2290142325307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565020232211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3633172781 + ... + 3633173486.

It is an arithmetic number, because the mean of its divisors is an integer number (643071644718).

Almost surely, 2^{2565020232251} is an apocalyptic number.

2565020232251 is a deficient number, since it is larger than the sum of its proper divisors (7266346621).

2565020232251 is an equidigital number, since it uses as much as digits as its factorization.

2565020232251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7266346620.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 2565020232251 in words is "two trillion, five hundred sixty-five billion, twenty million, two hundred thirty-two thousand, two hundred fifty-one".