256322147 has 4 divisors (see below), whose sum is σ = 256359936. Its totient is φ = 256284360.

The previous prime is 256322117. The next prime is 256322153. The reversal of 256322147 is 741223652.

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 256322147 - 2¹⁰ = 256321123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256322117) 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, 5603 + ... + 23324.

It is an arithmetic number, because the mean of its divisors is an integer number (64089984).

Almost surely, 2^256322147 is an apocalyptic number.

256322147 is a deficient number, since it is larger than the sum of its proper divisors (37789).

256322147 is an equidigital number, since it uses as much as digits as its factorization.

256322147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37788.

The product of its digits is 20160, while the sum is 32.

The square root of 256322147 is about 16010.0639286669. The cubic root of 256322147 is about 635.2266510651.

Adding to 256322147 its reverse (741223652), we get a palindrome (997545799).

The spelling of 256322147 in words is "two hundred fifty-six million, three hundred twenty-two thousand, one hundred forty-seven".