517821612 has 96 divisors (see below), whose sum is σ = 1537267200. Its totient is φ = 134487360.

The previous prime is 517821589. The next prime is 517821653. The reversal of 517821612 is 216128715.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39558 + ... + 50994.

It is an arithmetic number, because the mean of its divisors is an integer number (16013200).

Almost surely, 2^517821612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 517821612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768633600).

517821612 is an abundant number, since it is smaller than the sum of its proper divisors (1019445588).

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

517821612 is a wasteful number, since it uses less digits than its factorization.

517821612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476 (or 11460 counting only the distinct ones).

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

The square root of 517821612 is about 22755.6940566532. The cubic root of 517821612 is about 803.0206696716.

The spelling of 517821612 in words is "five hundred seventeen million, eight hundred twenty-one thousand, six hundred twelve".