256103273 has 2 divisors, whose sum is σ = 256103274. Its totient is φ = 256103272.

The previous prime is 256103269. The next prime is 256103293. The reversal of 256103273 is 372301652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157954624 + 98148649 = 12568^2 + 9907^2 .

It is a cyclic number.

It is not a de Polignac number, because 256103273 - 2² = 256103269 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 (256103293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128051636 + 128051637.

It is an arithmetic number, because the mean of its divisors is an integer number (128051637).

Almost surely, 2^256103273 is an apocalyptic number.

It is an amenable number.

256103273 is a deficient number, since it is larger than the sum of its proper divisors (1).

256103273 is an equidigital number, since it uses as much as digits as its factorization.

256103273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 256103273 is about 16003.2269558361. The cubic root of 256103273 is about 635.0457924692.

The spelling of 256103273 in words is "two hundred fifty-six million, one hundred three thousand, two hundred seventy-three".