256433201 has 4 divisors (see below), whose sum is σ = 256606452. Its totient is φ = 256259952.

The previous prime is 256433197. The next prime is 256433207. The reversal of 256433201 is 102334652.

256433201 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 can be written as a sum of positive squares in 2 ways, for example, as 243328801 + 13104400 = 15599^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 256433201 - 2² = 256433197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256433207) 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, 84386 + ... + 87371.

It is an arithmetic number, because the mean of its divisors is an integer number (64151613).

Almost surely, 2^256433201 is an apocalyptic number.

It is an amenable number.

256433201 is a deficient number, since it is larger than the sum of its proper divisors (173251).

256433201 is a wasteful number, since it uses less digits than its factorization.

256433201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173250.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 256433201 is about 16013.5318090670. The cubic root of 256433201 is about 635.3183771420.

Adding to 256433201 its reverse (102334652), we get a palindrome (358767853).

The spelling of 256433201 in words is "two hundred fifty-six million, four hundred thirty-three thousand, two hundred one".