257235163 has 2 divisors, whose sum is σ = 257235164. Its totient is φ = 257235162.

The previous prime is 257235157. The next prime is 257235203. The reversal of 257235163 is 361532752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257235163 - 2⁵ = 257235131 is a prime.

It is not a weakly prime, because it can be changed into another prime (257235113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128617581 + 128617582.

It is an arithmetic number, because the mean of its divisors is an integer number (128617582).

Almost surely, 2^257235163 is an apocalyptic number.

257235163 is a deficient number, since it is larger than the sum of its proper divisors (1).

257235163 is an equidigital number, since it uses as much as digits as its factorization.

257235163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 34.

The square root of 257235163 is about 16038.5523972708. The cubic root of 257235163 is about 635.9799802184.

The spelling of 257235163 in words is "two hundred fifty-seven million, two hundred thirty-five thousand, one hundred sixty-three".