256244101 has 4 divisors (see below), whose sum is σ = 256418604. Its totient is φ = 256069600.

The previous prime is 256244099. The next prime is 256244123. The reversal of 256244101 is 101442652.

It is a happy number.

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 121660900 + 134583201 = 11030^2 + 11601^2 .

It is a cyclic number.

It is not a de Polignac number, because 256244101 - 2¹ = 256244099 is a prime.

It is a super-2 number, since 2×256244101² = 131322078594596402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256244161) 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, 85030 + ... + 87991.

It is an arithmetic number, because the mean of its divisors is an integer number (64104651).

Almost surely, 2^256244101 is an apocalyptic number.

It is an amenable number.

256244101 is a deficient number, since it is larger than the sum of its proper divisors (174503).

256244101 is a wasteful number, since it uses less digits than its factorization.

256244101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174502.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 256244101 is about 16007.6263387174. The cubic root of 256244101 is about 635.1621723971.

Adding to 256244101 its reverse (101442652), we get a palindrome (357686753).

The spelling of 256244101 in words is "two hundred fifty-six million, two hundred forty-four thousand, one hundred one".