512171982 has 96 divisors (see below), whose sum is σ = 1324599744. Its totient is φ = 139968000.

The previous prime is 512171977. The next prime is 512171983. The reversal of 512171982 is 289171215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512171983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283482 + ... + 285282.

It is an arithmetic number, because the mean of its divisors is an integer number (13797914).

Almost surely, 2^512171982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 512171982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662299872).

512171982 is an abundant number, since it is smaller than the sum of its proper divisors (812427762).

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

512171982 is a wasteful number, since it uses less digits than its factorization.

512171982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914 (or 1911 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 512171982 is about 22631.2169800919. The cubic root of 512171982 is about 800.0895639308.

The spelling of 512171982 in words is "five hundred twelve million, one hundred seventy-one thousand, nine hundred eighty-two".