256488533 has 4 divisors (see below), whose sum is σ = 293129760. Its totient is φ = 219847308.

The previous prime is 256488527. The next prime is 256488559. The reversal of 256488533 is 335884652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256488533 - 2¹⁶ = 256422997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256488233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18320603 + ... + 18320616.

It is an arithmetic number, because the mean of its divisors is an integer number (73282440).

Almost surely, 2^256488533 is an apocalyptic number.

It is an amenable number.

256488533 is a deficient number, since it is larger than the sum of its proper divisors (36641227).

256488533 is an equidigital number, since it uses as much as digits as its factorization.

256488533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36641226.

The product of its digits is 691200, while the sum is 44.

The square root of 256488533 is about 16015.2593797291. The cubic root of 256488533 is about 635.3640692342.

The spelling of 256488533 in words is "two hundred fifty-six million, four hundred eighty-eight thousand, five hundred thirty-three".