521704712 has 8 divisors (see below), whose sum is σ = 978196350. Its totient is φ = 260852352.

The previous prime is 521704639. The next prime is 521704741. The reversal of 521704712 is 217407125.

It can be written as a sum of positive squares in only one way, i.e., 504182116 + 17522596 = 22454^2 + 4186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32606537 + ... + 32606552.

Almost surely, 2^521704712 is an apocalyptic number.

It is an amenable number.

521704712 is a deficient number, since it is larger than the sum of its proper divisors (456491638).

521704712 is a wasteful number, since it uses less digits than its factorization.

521704712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65213095 (or 65213091 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 521704712 is about 22840.8562011147. The cubic root of 521704712 is about 805.0229341614.

The spelling of 521704712 in words is "five hundred twenty-one million, seven hundred four thousand, seven hundred twelve".