256141531 has 4 divisors (see below), whose sum is σ = 257094000. Its totient is φ = 255189064.

The previous prime is 256141519. The next prime is 256141541. The reversal of 256141531 is 135141652.

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

It is a cyclic number.

It is not a de Polignac number, because 256141531 - 2⁹ = 256141019 is a prime.

It is a super-2 number, since 2×256141531² = 131216967806047922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256141531.

It is not an unprimeable number, because it can be changed into a prime (256141541) 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, 475831 + ... + 476368.

It is an arithmetic number, because the mean of its divisors is an integer number (64273500).

Almost surely, 2^256141531 is an apocalyptic number.

256141531 is a deficient number, since it is larger than the sum of its proper divisors (952469).

256141531 is an equidigital number, since it uses as much as digits as its factorization.

256141531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952468.

The product of its digits is 3600, while the sum is 28.

The square root of 256141531 is about 16004.4222326206. The cubic root of 256141531 is about 635.0774130104.

The spelling of 256141531 in words is "two hundred fifty-six million, one hundred forty-one thousand, five hundred thirty-one".