256284475 has 6 divisors (see below), whose sum is σ = 317792780. Its totient is φ = 205027560.

The previous prime is 256284439. The next prime is 256284487. The reversal of 256284475 is 574482652.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-256284475 is a prime.

It is a super-3 number, since 3×256284475³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5125665 + ... + 5125714.

Almost surely, 2^256284475 is an apocalyptic number.

256284475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256284475 is a deficient number, since it is larger than the sum of its proper divisors (61508305).

256284475 is a wasteful number, since it uses less digits than its factorization.

256284475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10251389 (or 10251384 counting only the distinct ones).

The product of its digits is 537600, while the sum is 43.

The square root of 256284475 is about 16008.8873754549. The cubic root of 256284475 is about 635.1955295108.

It can be divided in two parts, 25628 and 4475, that added together give a palindrome (30103).

The spelling of 256284475 in words is "two hundred fifty-six million, two hundred eighty-four thousand, four hundred seventy-five".