256517300253103 has 16 divisors (see below), whose sum is σ = 282226948819200. Its totient is φ = 232063686676800.

The previous prime is 256517300253101. The next prime is 256517300253113. The reversal of 256517300253103 is 301352003715652.

It is a cyclic number.

It is not a de Polignac number, because 256517300253103 - 2¹ = 256517300253101 is a prime.

It is a super-2 number, since 2×256517300253103² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256517300253103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256517300253101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488086873 + ... + 488612146.

It is an arithmetic number, because the mean of its divisors is an integer number (17639184301200).

Almost surely, 2^{256517300253103} is an apocalyptic number.

256517300253103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

256517300253103 is a deficient number, since it is larger than the sum of its proper divisors (25709648566097).

256517300253103 is a wasteful number, since it uses less digits than its factorization.

256517300253103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976699662.

The product of its (nonzero) digits is 567000, while the sum is 43.

Adding to 256517300253103 its reverse (301352003715652), we get a palindrome (557869303968755).

The spelling of 256517300253103 in words is "two hundred fifty-six trillion, five hundred seventeen billion, three hundred million, two hundred fifty-three thousand, one hundred three".