256531753 has 4 divisors (see below), whose sum is σ = 257159380. Its totient is φ = 255904128.

The previous prime is 256531741. The next prime is 256531813. The reversal of 256531753 is 357135652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182709289 + 73822464 = 13517^2 + 8592^2 .

It is a cyclic number.

It is not a de Polignac number, because 256531753 - 2⁵ = 256531721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256531153) 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, 313200 + ... + 314017.

It is an arithmetic number, because the mean of its divisors is an integer number (64289845).

Almost surely, 2^256531753 is an apocalyptic number.

It is an amenable number.

256531753 is a deficient number, since it is larger than the sum of its proper divisors (627627).

256531753 is an equidigital number, since it uses as much as digits as its factorization.

256531753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627626.

The product of its digits is 94500, while the sum is 37.

The square root of 256531753 is about 16016.6086610119. The cubic root of 256531753 is about 635.3997549007.

The spelling of 256531753 in words is "two hundred fifty-six million, five hundred thirty-one thousand, seven hundred fifty-three".