171223948820 has 24 divisors (see below), whose sum is σ = 378495045600. Its totient is φ = 64884864672.

The previous prime is 171223948817. The next prime is 171223948829. The reversal of 171223948820 is 28849322171.

171223948820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171223948829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225294290 + ... + 225295049.

It is an arithmetic number, because the mean of its divisors is an integer number (15770626900).

Almost surely, 2^171223948820 is an apocalyptic number.

171223948820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171223948820 is an abundant number, since it is smaller than the sum of its proper divisors (207271096780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171223948820 is a wasteful number, since it uses less digits than its factorization.

171223948820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450589367 (or 450589365 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 171223948820 in words is "one hundred seventy-one billion, two hundred twenty-three million, nine hundred forty-eight thousand, eight hundred twenty".