171213971952 has 40 divisors (see below), whose sum is σ = 449799425280. Its totient is φ = 56104012480.

The previous prime is 171213971947. The next prime is 171213971963. The reversal of 171213971952 is 259179312171.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30225624 + ... + 30231287.

It is an arithmetic number, because the mean of its divisors is an integer number (11244985632).

Almost surely, 2^171213971952 is an apocalyptic number.

171213971952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

171213971952 is an abundant number, since it is smaller than the sum of its proper divisors (278585453328).

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

171213971952 is a wasteful number, since it uses less digits than its factorization.

171213971952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60456981 (or 60456975 counting only the distinct ones).

The product of its digits is 238140, while the sum is 48.

The spelling of 171213971952 in words is "one hundred seventy-one billion, two hundred thirteen million, nine hundred seventy-one thousand, nine hundred fifty-two".