521012205 has 96 divisors (see below), whose sum is σ = 1093847040. Its totient is φ = 224104320.

The previous prime is 521012203. The next prime is 521012227. The reversal of 521012205 is 502210125.

It is not a de Polignac number, because 521012205 - 2¹ = 521012203 is a prime.

It is a super-3 number, since 3×521012205³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521012201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1573890 + ... + 1574220.

It is an arithmetic number, because the mean of its divisors is an integer number (11394240).

Almost surely, 2^521012205 is an apocalyptic number.

It is an amenable number.

521012205 is an abundant number, since it is smaller than the sum of its proper divisors (572834835).

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

521012205 is a wasteful number, since it uses less digits than its factorization.

521012205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 521012205 is about 22825.6917748400. The cubic root of 521012205 is about 804.6665826001. Note that the first 3 decimals are identical.

The spelling of 521012205 in words is "five hundred twenty-one million, twelve thousand, two hundred five".