256424201 has 4 divisors (see below), whose sum is σ = 279735504. Its totient is φ = 233112900.

The previous prime is 256424197. The next prime is 256424213. The reversal of 256424201 is 102424652.

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 not a de Polignac number, because 256424201 - 2² = 256424197 is a prime.

It is a super-3 number, since 3×256424201³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256424221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11655635 + ... + 11655656.

It is an arithmetic number, because the mean of its divisors is an integer number (69933876).

Almost surely, 2^256424201 is an apocalyptic number.

It is an amenable number.

256424201 is a deficient number, since it is larger than the sum of its proper divisors (23311303).

256424201 is a wasteful number, since it uses less digits than its factorization.

256424201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23311302.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 256424201 is about 16013.2507942641. The cubic root of 256424201 is about 635.3109444952.

Adding to 256424201 its reverse (102424652), we get a palindrome (358848853).

The spelling of 256424201 in words is "two hundred fifty-six million, four hundred twenty-four thousand, two hundred one".