521438612 has 24 divisors (see below), whose sum is σ = 958608000. Its totient is φ = 247703456.

The previous prime is 521438611. The next prime is 521438627. The reversal of 521438612 is 216834125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521438611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5312 + ... + 32727.

It is an arithmetic number, because the mean of its divisors is an integer number (39942000).

Almost surely, 2^521438612 is an apocalyptic number.

It is an amenable number.

521438612 is a deficient number, since it is larger than the sum of its proper divisors (437169388).

521438612 is a wasteful number, since it uses less digits than its factorization.

521438612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38215 (or 38213 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 521438612 is about 22835.0303700258. The cubic root of 521438612 is about 804.8860412478.

The spelling of 521438612 in words is "five hundred twenty-one million, four hundred thirty-eight thousand, six hundred twelve".