256166201 has 2 divisors, whose sum is σ = 256166202. Its totient is φ = 256166200.

The previous prime is 256166191. The next prime is 256166219. The reversal of 256166201 is 102661652.

256166201 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 can be written as a sum of positive squares in only one way, i.e., 254370601 + 1795600 = 15949^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 256166201 - 2²² = 251971897 is a prime.

It is a super-2 number, since 2×256166201² = 131242245069544802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256166101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128083100 + 128083101.

It is an arithmetic number, because the mean of its divisors is an integer number (128083101).

Almost surely, 2^256166201 is an apocalyptic number.

It is an amenable number.

256166201 is a deficient number, since it is larger than the sum of its proper divisors (1).

256166201 is an equidigital number, since it uses as much as digits as its factorization.

256166201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 256166201 is about 16005.1929385434. The cubic root of 256166201 is about 635.0978012917.

The spelling of 256166201 in words is "two hundred fifty-six million, one hundred sixty-six thousand, two hundred one".