163120503 has 32 divisors (see below), whose sum is σ = 273401856. Its totient is φ = 84204288.

The previous prime is 163120493. The next prime is 163120519. The reversal of 163120503 is 305021361.

It is not a de Polignac number, because 163120503 - 2⁴ = 163120487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 163120503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163120553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6475 + ... + 19187.

It is an arithmetic number, because the mean of its divisors is an integer number (8543808).

Almost surely, 2^163120503 is an apocalyptic number.

163120503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

163120503 is a deficient number, since it is larger than the sum of its proper divisors (110281353).

163120503 is a wasteful number, since it uses less digits than its factorization.

163120503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12783.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 163120503 is about 12771.8637246097. The cubic root of 163120503 is about 546.3901363078.

Adding to 163120503 its reverse (305021361), we get a palindrome (468141864).

The spelling of 163120503 in words is "one hundred sixty-three million, one hundred twenty thousand, five hundred three".