2256521365 has 8 divisors (see below), whose sum is σ = 3094657920. Its totient is φ = 1547328912.

The previous prime is 2256521359. The next prime is 2256521417. The reversal of 2256521365 is 5631256522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2256521365 is a prime.

It is a congruent number.

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, 32235985 + ... + 32236054.

It is an arithmetic number, because the mean of its divisors is an integer number (386832240).

Almost surely, 2^2256521365 is an apocalyptic number.

It is an amenable number.

2256521365 is a deficient number, since it is larger than the sum of its proper divisors (838136555).

2256521365 is an equidigital number, since it uses as much as digits as its factorization.

2256521365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64472051.

The product of its digits is 108000, while the sum is 37.

The square root of 2256521365 is about 47502.8563878005. The cubic root of 2256521365 is about 1311.6354619804.

Adding to 2256521365 its reverse (5631256522), we get a palindrome (7887777887).

The spelling of 2256521365 in words is "two billion, two hundred fifty-six million, five hundred twenty-one thousand, three hundred sixty-five".