256259135 has 8 divisors (see below), whose sum is σ = 335466576. Its totient is φ = 186370240.

The previous prime is 256259131. The next prime is 256259141. The reversal of 256259135 is 531952652.

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

It is not a de Polignac number, because 256259135 - 2² = 256259131 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 (256259131) 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, 2329574 + ... + 2329683.

It is an arithmetic number, because the mean of its divisors is an integer number (41933322).

Almost surely, 2^256259135 is an apocalyptic number.

256259135 is a deficient number, since it is larger than the sum of its proper divisors (79207441).

256259135 is a wasteful number, since it uses less digits than its factorization.

256259135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659273.

The product of its digits is 81000, while the sum is 38.

The square root of 256259135 is about 16008.0959205022. The cubic root of 256259135 is about 635.1745939401.

The spelling of 256259135 in words is "two hundred fifty-six million, two hundred fifty-nine thousand, one hundred thirty-five".