256231455 has 16 divisors (see below), whose sum is σ = 413601120. Its totient is φ = 135446528.

The previous prime is 256231433. The next prime is 256231457. The reversal of 256231455 is 554132652.

It is a cyclic number.

It is not a de Polignac number, because 256231455 - 2¹³ = 256223263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256231457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73890 + ... + 77279.

It is an arithmetic number, because the mean of its divisors is an integer number (25850070).

Almost surely, 2^256231455 is an apocalyptic number.

256231455 is a deficient number, since it is larger than the sum of its proper divisors (157369665).

256231455 is a wasteful number, since it uses less digits than its factorization.

256231455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151290.

The product of its digits is 36000, while the sum is 33.

The square root of 256231455 is about 16007.2313346187. The cubic root of 256231455 is about 635.1517235153.

It can be divided in two parts, 256231 and 455, that added together give a triangular number (256686 = T₇₁₆).

The spelling of 256231455 in words is "two hundred fifty-six million, two hundred thirty-one thousand, four hundred fifty-five".