163503257 has 2 divisors, whose sum is σ = 163503258. Its totient is φ = 163503256.

The previous prime is 163503239. The next prime is 163503281. The reversal of 163503257 is 752305361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145347136 + 18156121 = 12056^2 + 4261^2 .

It is a cyclic number.

It is not a de Polignac number, because 163503257 - 2¹⁶ = 163437721 is a prime.

It is not a weakly prime, because it can be changed into another prime (163503287) 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, 81751628 + 81751629.

It is an arithmetic number, because the mean of its divisors is an integer number (81751629).

Almost surely, 2^163503257 is an apocalyptic number.

It is an amenable number.

163503257 is a deficient number, since it is larger than the sum of its proper divisors (1).

163503257 is an equidigital number, since it uses as much as digits as its factorization.

163503257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 163503257 is about 12786.8392106885. The cubic root of 163503257 is about 546.8171614129.

The spelling of 163503257 in words is "one hundred sixty-three million, five hundred three thousand, two hundred fifty-seven".