256185011 has 2 divisors, whose sum is σ = 256185012. Its totient is φ = 256185010.

The previous prime is 256185001. The next prime is 256185031. The reversal of 256185011 is 110581652.

256185011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256185011 - 2¹⁰ = 256183987 is a prime.

It is a super-2 number, since 2×256185011² = 131261519722140242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256185001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128092505 + 128092506.

It is an arithmetic number, because the mean of its divisors is an integer number (128092506).

Almost surely, 2^256185011 is an apocalyptic number.

256185011 is a deficient number, since it is larger than the sum of its proper divisors (1).

256185011 is an equidigital number, since it uses as much as digits as its factorization.

256185011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 256185011 is about 16005.7805495390. The cubic root of 256185011 is about 635.1133457536.

The spelling of 256185011 in words is "two hundred fifty-six million, one hundred eighty-five thousand, eleven".