256065253 has 2 divisors, whose sum is σ = 256065254. Its totient is φ = 256065252.

The previous prime is 256065221. The next prime is 256065269. The reversal of 256065253 is 352560652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148279329 + 107785924 = 12177^2 + 10382^2 .

It is a cyclic number.

It is not a de Polignac number, because 256065253 - 2⁵ = 256065221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256065283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128032626 + 128032627.

It is an arithmetic number, because the mean of its divisors is an integer number (128032627).

Almost surely, 2^256065253 is an apocalyptic number.

It is an amenable number.

256065253 is a deficient number, since it is larger than the sum of its proper divisors (1).

256065253 is an equidigital number, since it uses as much as digits as its factorization.

256065253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 256065253 is about 16002.0390263241. The cubic root of 256065253 is about 635.0143655171.

The spelling of 256065253 in words is "two hundred fifty-six million, sixty-five thousand, two hundred fifty-three".