256711471 has 4 divisors (see below), whose sum is σ = 258286552. Its totient is φ = 255136392.

The previous prime is 256711463. The next prime is 256711501. The reversal of 256711471 is 174117652.

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 256711471 - 2³ = 256711463 is a prime.

It is a super-3 number, since 3×256711471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256711571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787296 + ... + 787621.

It is an arithmetic number, because the mean of its divisors is an integer number (64571638).

Almost surely, 2^256711471 is an apocalyptic number.

256711471 is a deficient number, since it is larger than the sum of its proper divisors (1575081).

256711471 is a wasteful number, since it uses less digits than its factorization.

256711471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575080.

The product of its digits is 11760, while the sum is 34.

The square root of 256711471 is about 16022.2180424559. The cubic root of 256711471 is about 635.5481005611.

The spelling of 256711471 in words is "two hundred fifty-six million, seven hundred eleven thousand, four hundred seventy-one".