257316133 has 2 divisors, whose sum is σ = 257316134. Its totient is φ = 257316132.

The previous prime is 257316091. The next prime is 257316139. The reversal of 257316133 is 331613752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247842049 + 9474084 = 15743^2 + 3078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257316133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257316095 and 257316104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257316139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128658066 + 128658067.

It is an arithmetic number, because the mean of its divisors is an integer number (128658067).

Almost surely, 2^257316133 is an apocalyptic number.

It is an amenable number.

257316133 is a deficient number, since it is larger than the sum of its proper divisors (1).

257316133 is an equidigital number, since it uses as much as digits as its factorization.

257316133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 31.

The square root of 257316133 is about 16041.0764289682. The cubic root of 257316133 is about 636.0467024300.

Adding to 257316133 its reverse (331613752), we get a palindrome (588929885).

The spelling of 257316133 in words is "two hundred fifty-seven million, three hundred sixteen thousand, one hundred thirty-three".