256854473 has 4 divisors (see below), whose sum is σ = 258555648. Its totient is φ = 255153300.

The previous prime is 256854461. The next prime is 256854487. The reversal of 256854473 is 374458652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256854473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256854443) 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, 850361 + ... + 850662.

It is an arithmetic number, because the mean of its divisors is an integer number (64638912).

Almost surely, 2^256854473 is an apocalyptic number.

It is an amenable number.

256854473 is a deficient number, since it is larger than the sum of its proper divisors (1701175).

256854473 is a wasteful number, since it uses less digits than its factorization.

256854473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701174.

The product of its digits is 806400, while the sum is 44.

The square root of 256854473 is about 16026.6800367387. The cubic root of 256854473 is about 635.6660900669. Note that the first 3 decimals are identical.

The spelling of 256854473 in words is "two hundred fifty-six million, eight hundred fifty-four thousand, four hundred seventy-three".