256320411 has 4 divisors (see below), whose sum is σ = 341760552. Its totient is φ = 170880272.

The previous prime is 256320409. The next prime is 256320413. The reversal of 256320411 is 114023652.

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

It is an interprime number because it is at equal distance from previous prime (256320409) and next prime (256320413).

It is a cyclic number.

It is not a de Polignac number, because 256320411 - 2¹ = 256320409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256320413) 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, 42720066 + ... + 42720071.

It is an arithmetic number, because the mean of its divisors is an integer number (85440138).

Almost surely, 2^256320411 is an apocalyptic number.

256320411 is a deficient number, since it is larger than the sum of its proper divisors (85440141).

256320411 is an equidigital number, since it uses as much as digits as its factorization.

256320411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85440140.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 256320411 is about 16010.0097126766. The cubic root of 256320411 is about 635.2252169896.

The spelling of 256320411 in words is "two hundred fifty-six million, three hundred twenty thousand, four hundred eleven".