256252316535243 has 24 divisors (see below), whose sum is σ = 423023450743296. Its totient is φ = 146428595838000.

The previous prime is 256252316535119. The next prime is 256252316535251. The reversal of 256252316535243 is 342535613252652.

256252316535243 is a `hidden beast` number, since 2 + 5 + 6 + 2 + 52 + 3 + 1 + 65 + 3 + 524 + 3 = 666.

256252316535243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256252316535243 - 2²⁴ = 256252299758027 is a prime.

It is a super-2 number, since 2×256252316535243² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256252316535243.

It is not an unprimeable number, because it can be changed into a prime (256252316534243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10867443 + ... + 25111868.

It is an arithmetic number, because the mean of its divisors is an integer number (17625977114304).

Almost surely, 2^{256252316535243} is an apocalyptic number.

256252316535243 is a deficient number, since it is larger than the sum of its proper divisors (166771134208053).

256252316535243 is a wasteful number, since it uses less digits than its factorization.

256252316535243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36092375 (or 36092372 counting only the distinct ones).

The product of its digits is 38880000, while the sum is 54.

Adding to 256252316535243 its reverse (342535613252652), we get a palindrome (598787929787895).

The spelling of 256252316535243 in words is "two hundred fifty-six trillion, two hundred fifty-two billion, three hundred sixteen million, five hundred thirty-five thousand, two hundred forty-three".