257331853 has 2 divisors, whose sum is σ = 257331854. Its totient is φ = 257331852.

The previous prime is 257331829. The next prime is 257331857. The reversal of 257331853 is 358133752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255584169 + 1747684 = 15987^2 + 1322^2 .

It is a cyclic number.

It is not a de Polignac number, because 257331853 - 2⁵ = 257331821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257331857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128665926 + 128665927.

It is an arithmetic number, because the mean of its divisors is an integer number (128665927).

Almost surely, 2^257331853 is an apocalyptic number.

It is an amenable number.

257331853 is a deficient number, since it is larger than the sum of its proper divisors (1).

257331853 is an equidigital number, since it uses as much as digits as its factorization.

257331853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The square root of 257331853 is about 16041.5664135395. The cubic root of 257331853 is about 636.0596546565.

The spelling of 257331853 in words is "two hundred fifty-seven million, three hundred thirty-one thousand, eight hundred fifty-three".