256118135 has 16 divisors (see below), whose sum is σ = 378267456. Its totient is φ = 162114048.

The previous prime is 256118099. The next prime is 256118147. The reversal of 256118135 is 531811652.

It is a cyclic number.

It is not a de Polignac number, because 256118135 - 2¹⁴ = 256101751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280994 + ... + 281903.

It is an arithmetic number, because the mean of its divisors is an integer number (23641716).

Almost surely, 2^256118135 is an apocalyptic number.

256118135 is a deficient number, since it is larger than the sum of its proper divisors (122149321).

256118135 is a wasteful number, since it uses less digits than its factorization.

256118135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562922.

The product of its digits is 7200, while the sum is 32.

The square root of 256118135 is about 16003.6912929486. The cubic root of 256118135 is about 635.0580764044.

Adding to 256118135 its reverse (531811652), we get a palindrome (787929787).

The spelling of 256118135 in words is "two hundred fifty-six million, one hundred eighteen thousand, one hundred thirty-five".