256334671 has 2 divisors, whose sum is σ = 256334672. Its totient is φ = 256334670.

The previous prime is 256334647. The next prime is 256334677. The reversal of 256334671 is 176433652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256334671 - 2⁷ = 256334543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256334671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256334677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128167335 + 128167336.

It is an arithmetic number, because the mean of its divisors is an integer number (128167336).

Almost surely, 2^256334671 is an apocalyptic number.

256334671 is a deficient number, since it is larger than the sum of its proper divisors (1).

256334671 is an equidigital number, since it uses as much as digits as its factorization.

256334671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 256334671 is about 16010.4550528709. The cubic root of 256334671 is about 635.2369967038.

The spelling of 256334671 in words is "two hundred fifty-six million, three hundred thirty-four thousand, six hundred seventy-one".