16172231803 has 24 divisors (see below), whose sum is σ = 20267891280. Its totient is φ = 12790451520.

The previous prime is 16172231711. The next prime is 16172231809. The reversal of 16172231803 is 30813227161.

It is a de Polignac number, because none of the positive numbers 2^k-16172231803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16172231809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2679393 + ... + 2685421.

It is an arithmetic number, because the mean of its divisors is an integer number (844495470).

Almost surely, 2^16172231803 is an apocalyptic number.

16172231803 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16172231803 is a deficient number, since it is larger than the sum of its proper divisors (4095659477).

16172231803 is a wasteful number, since it uses less digits than its factorization.

16172231803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267 (or 10260 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 16172231803 its reverse (30813227161), we get a palindrome (46985458964).

The spelling of 16172231803 in words is "sixteen billion, one hundred seventy-two million, two hundred thirty-one thousand, eight hundred three".