257031113 has 2 divisors, whose sum is σ = 257031114. Its totient is φ = 257031112.

The previous prime is 257031077. The next prime is 257031121. The reversal of 257031113 is 311130752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252587449 + 4443664 = 15893^2 + 2108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257031113 is a prime.

It is not a weakly prime, because it can be changed into another prime (257031133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128515556 + 128515557.

It is an arithmetic number, because the mean of its divisors is an integer number (128515557).

Almost surely, 2^257031113 is an apocalyptic number.

It is an amenable number.

257031113 is a deficient number, since it is larger than the sum of its proper divisors (1).

257031113 is an equidigital number, since it uses as much as digits as its factorization.

257031113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 257031113 is about 16032.1899003224. The cubic root of 257031113 is about 635.8117735056.

Adding to 257031113 its reverse (311130752), we get a palindrome (568161865).

The spelling of 257031113 in words is "two hundred fifty-seven million, thirty-one thousand, one hundred thirteen".