163503221432003 has 2 divisors, whose sum is σ = 163503221432004. Its totient is φ = 163503221432002.

The previous prime is 163503221431969. The next prime is 163503221432027. The reversal of 163503221432003 is 300234122305361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163503221432003 - 2⁸ = 163503221431747 is a prime.

It is not a weakly prime, because it can be changed into another prime (163503221432303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81751610716001 + 81751610716002.

It is an arithmetic number, because the mean of its divisors is an integer number (81751610716002).

Almost surely, 2^{163503221432003} is an apocalyptic number.

163503221432003 is a deficient number, since it is larger than the sum of its proper divisors (1).

163503221432003 is an equidigital number, since it uses as much as digits as its factorization.

163503221432003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 163503221432003 its reverse (300234122305361), we get a palindrome (463737343737364).

The spelling of 163503221432003 in words is "one hundred sixty-three trillion, five hundred three billion, two hundred twenty-one million, four hundred thirty-two thousand, three".