2256520345 has 8 divisors (see below), whose sum is σ = 2708101440. Its totient is φ = 1805031600.

The previous prime is 2256520339. The next prime is 2256520393. The reversal of 2256520345 is 5430256522.

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

It is a de Polignac number, because none of the positive numbers 2^k-2256520345 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2256520345.

It is an unprimeable number.

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, 54196 + ... + 86314.

It is an arithmetic number, because the mean of its divisors is an integer number (338512680).

Almost surely, 2^2256520345 is an apocalyptic number.

It is an amenable number.

2256520345 is a deficient number, since it is larger than the sum of its proper divisors (451581095).

2256520345 is a wasteful number, since it uses less digits than its factorization.

2256520345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46175.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 2256520345 is about 47502.8456516028. The cubic root of 2256520345 is about 1311.6352643505.

Adding to 2256520345 its reverse (5430256522), we get a palindrome (7686776867).

The spelling of 2256520345 in words is "two billion, two hundred fifty-six million, five hundred twenty thousand, three hundred forty-five".