521960072 has 8 divisors (see below), whose sum is σ = 978675150. Its totient is φ = 260980032.

The previous prime is 521960071. The next prime is 521960093. The reversal of 521960072 is 270069125.

It can be written as a sum of positive squares in only one way, i.e., 521391556 + 568516 = 22834^2 + 754^2 .

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

It is not an unprimeable number, because it can be changed into a prime (521960071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32622497 + ... + 32622512.

Almost surely, 2^521960072 is an apocalyptic number.

It is an amenable number.

521960072 is a deficient number, since it is larger than the sum of its proper divisors (456715078).

521960072 is a wasteful number, since it uses less digits than its factorization.

521960072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65245015 (or 65245011 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 521960072 is about 22846.4455003399. The cubic root of 521960072 is about 805.1542582102.

The spelling of 521960072 in words is "five hundred twenty-one million, nine hundred sixty thousand, seventy-two".