256253047131 has 8 divisors (see below), whose sum is σ = 341881513744. Its totient is φ = 170729972640.

The previous prime is 256253047129. The next prime is 256253047157. The reversal of 256253047131 is 131740352652.

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

It is not a de Polignac number, because 256253047131 - 2¹ = 256253047129 is a prime.

It is a super-4 number, since 4×256253047131⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

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 256253047131.

It is not an unprimeable number, because it can be changed into a prime (256253047111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26342356 + ... + 26352081.

It is an arithmetic number, because the mean of its divisors is an integer number (42735189218).

Almost surely, 2^256253047131 is an apocalyptic number.

256253047131 is a deficient number, since it is larger than the sum of its proper divisors (85628466613).

256253047131 is a wasteful number, since it uses less digits than its factorization.

256253047131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52696061.

The product of its (nonzero) digits is 151200, while the sum is 39.

Adding to 256253047131 its reverse (131740352652), we get a palindrome (387993399783).

The spelling of 256253047131 in words is "two hundred fifty-six billion, two hundred fifty-three million, forty-seven thousand, one hundred thirty-one".