521354212 has 12 divisors (see below), whose sum is σ = 912530556. Its totient is φ = 260631200.

The previous prime is 521354201. The next prime is 521354213. The reversal of 521354212 is 212453125.

It can be written as a sum of positive squares in 2 ways, for example, as 225720576 + 295633636 = 15024^2 + 17194^2 .

It is not an unprimeable number, because it can be changed into a prime (521354213) 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 3 ways as a sum of consecutive naturals, for example, 34878 + ... + 47530.

It is an arithmetic number, because the mean of its divisors is an integer number (76044213).

Almost surely, 2^521354212 is an apocalyptic number.

It is an amenable number.

521354212 is a deficient number, since it is larger than the sum of its proper divisors (391176344).

521354212 is a wasteful number, since it uses less digits than its factorization.

521354212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22958 (or 22956 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 521354212 is about 22833.1822574077. The cubic root of 521354212 is about 804.8426126474.

The spelling of 521354212 in words is "five hundred twenty-one million, three hundred fifty-four thousand, two hundred twelve".