256047523 has 8 divisors (see below), whose sum is σ = 282896928. Its totient is φ = 230507904.

The previous prime is 256047509. The next prime is 256047527. The reversal of 256047523 is 325740652.

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

It is a cyclic number.

It is not a de Polignac number, because 256047523 - 2¹³ = 256039331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256047527) 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, 327036 + ... + 327817.

It is an arithmetic number, because the mean of its divisors is an integer number (35362116).

Almost surely, 2^256047523 is an apocalyptic number.

256047523 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

256047523 is a deficient number, since it is larger than the sum of its proper divisors (26849405).

256047523 is a wasteful number, since it uses less digits than its factorization.

256047523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654893.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 256047523 is about 16001.4850248344. The cubic root of 256047523 is about 634.9997090126. Note that the first 3 decimals are identical.

The spelling of 256047523 in words is "two hundred fifty-six million, forty-seven thousand, five hundred twenty-three".