521022012 has 96 divisors (see below), whose sum is σ = 1454326272. Its totient is φ = 142062336.

The previous prime is 521021989. The next prime is 521022023. The reversal of 521022012 is 210220125.

It is a super-4 number, since 4×521022012⁴ (a number of 36 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521021982 and 521022000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163143 + ... + 166305.

It is an arithmetic number, because the mean of its divisors is an integer number (15149232).

Almost surely, 2^521022012 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 521022012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727163136).

521022012 is an abundant number, since it is smaller than the sum of its proper divisors (933304260).

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

521022012 is a wasteful number, since it uses less digits than its factorization.

521022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267 (or 3265 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 521022012 is about 22825.9065975483. The cubic root of 521022012 is about 804.6716313083.

Adding to 521022012 its reverse (210220125), we get a palindrome (731242137).

The spelling of 521022012 in words is "five hundred twenty-one million, twenty-two thousand, twelve".