256332547 has 4 divisors (see below), whose sum is σ = 258289416. Its totient is φ = 254375680.

The previous prime is 256332529. The next prime is 256332551. The reversal of 256332547 is 745233652.

256332547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256332547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256332347) 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, 978238 + ... + 978499.

It is an arithmetic number, because the mean of its divisors is an integer number (64572354).

Almost surely, 2^256332547 is an apocalyptic number.

256332547 is a deficient number, since it is larger than the sum of its proper divisors (1956869).

256332547 is a wasteful number, since it uses less digits than its factorization.

256332547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956868.

The product of its digits is 151200, while the sum is 37.

The square root of 256332547 is about 16010.3887210773. The cubic root of 256332547 is about 635.2352421654.

The spelling of 256332547 in words is "two hundred fifty-six million, three hundred thirty-two thousand, five hundred forty-seven".