256943201 has 2 divisors, whose sum is σ = 256943202. Its totient is φ = 256943200.

The previous prime is 256943179. The next prime is 256943209. The reversal of 256943201 is 102349652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163840000 + 93103201 = 12800^2 + 9649^2 .

It is a cyclic number.

It is not a de Polignac number, because 256943201 - 2²² = 252748897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (256943209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128471600 + 128471601.

It is an arithmetic number, because the mean of its divisors is an integer number (128471601).

Almost surely, 2^256943201 is an apocalyptic number.

It is an amenable number.

256943201 is a deficient number, since it is larger than the sum of its proper divisors (1).

256943201 is an equidigital number, since it uses as much as digits as its factorization.

256943201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 256943201 is about 16029.4479318534. The cubic root of 256943201 is about 635.7392766292.

The spelling of 256943201 in words is "two hundred fifty-six million, nine hundred forty-three thousand, two hundred one".