256017351 has 8 divisors (see below), whose sum is σ = 346032880. Its totient is φ = 168340032.

The previous prime is 256017317. The next prime is 256017353. The reversal of 256017351 is 153710652.

256017351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 256017351 - 2¹⁵ = 255984583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256017353) 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, 584296 + ... + 584733.

It is an arithmetic number, because the mean of its divisors is an integer number (43254110).

Almost surely, 2^256017351 is an apocalyptic number.

256017351 is a deficient number, since it is larger than the sum of its proper divisors (90015529).

256017351 is a wasteful number, since it uses less digits than its factorization.

256017351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169105.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 256017351 is about 16000.5422095628. The cubic root of 256017351 is about 634.9747657734.

The spelling of 256017351 in words is "two hundred fifty-six million, seventeen thousand, three hundred fifty-one".