171285211320 has 128 divisors (see below), whose sum is σ = 524904494400. Its totient is φ = 44698394624.

The previous prime is 171285211303. The next prime is 171285211327. The reversal of 171285211320 is 23112582171.

171285211320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×171285211320² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171285211327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2439424 + ... + 2508656.

Almost surely, 2^171285211320 is an apocalyptic number.

171285211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171285211320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262452247200).

171285211320 is an abundant number, since it is smaller than the sum of its proper divisors (353619283080).

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

171285211320 is a wasteful number, since it uses less digits than its factorization.

171285211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69689 (or 69685 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

Adding to 171285211320 its reverse (23112582171), we get a palindrome (194397793491).

The spelling of 171285211320 in words is "one hundred seventy-one billion, two hundred eighty-five million, two hundred eleven thousand, three hundred twenty".