522171020 has 24 divisors (see below), whose sum is σ = 1253210784. Its totient is φ = 179030016.

The previous prime is 522171019. The next prime is 522171029. The reversal of 522171020 is 20171225.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 522170983 and 522171001.

It is not an unprimeable number, because it can be changed into a prime (522171029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1864757 + ... + 1865036.

It is an arithmetic number, because the mean of its divisors is an integer number (52217116).

Almost surely, 2^522171020 is an apocalyptic number.

It is an amenable number.

522171020 is an abundant number, since it is smaller than the sum of its proper divisors (731039764).

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

522171020 is a wasteful number, since it uses less digits than its factorization.

522171020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729809 (or 3729807 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 522171020 is about 22851.0616821188. The cubic root of 522171020 is about 805.2627101869.

The spelling of 522171020 in words is "five hundred twenty-two million, one hundred seventy-one thousand, twenty".