256239361 has 8 divisors (see below), whose sum is σ = 293500800. Its totient is φ = 219141888.

The previous prime is 256239359. The next prime is 256239367. The reversal of 256239361 is 163932652.

256239361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256239361 - 2¹ = 256239359 is a prime.

It is a super-2 number, since 2×256239361² = 131317220251376642, 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 256239361.

It is not an unprimeable number, because it can be changed into a prime (256239367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37621 + ... + 43906.

It is an arithmetic number, because the mean of its divisors is an integer number (36687600).

Almost surely, 2^256239361 is an apocalyptic number.

It is an amenable number.

256239361 is a deficient number, since it is larger than the sum of its proper divisors (37261439).

256239361 is an equidigital number, since it uses as much as digits as its factorization.

256239361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81983.

The product of its digits is 58320, while the sum is 37.

The square root of 256239361 is about 16007.4782836023. The cubic root of 256239361 is about 635.1582559658.

The spelling of 256239361 in words is "two hundred fifty-six million, two hundred thirty-nine thousand, three hundred sixty-one".