256362481 has 2 divisors, whose sum is σ = 256362482. Its totient is φ = 256362480.

The previous prime is 256362461. The next prime is 256362503. The reversal of 256362481 is 184263652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255488256 + 874225 = 15984^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 256362481 - 2⁹ = 256361969 is a prime.

It is a super-2 number, since 2×256362481² = 131443443328950722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256362481.

It is not a weakly prime, because it can be changed into another prime (256362451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128181240 + 128181241.

It is an arithmetic number, because the mean of its divisors is an integer number (128181241).

Almost surely, 2^256362481 is an apocalyptic number.

It is an amenable number.

256362481 is a deficient number, since it is larger than the sum of its proper divisors (1).

256362481 is an equidigital number, since it uses as much as digits as its factorization.

256362481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 256362481 is about 16011.3235243062. The cubic root of 256362481 is about 635.2599683682.

The spelling of 256362481 in words is "two hundred fifty-six million, three hundred sixty-two thousand, four hundred eighty-one".