7000000521 has 8 divisors (see below), whose sum is σ = 9334763520. Its totient is φ = 4665952272.

The previous prime is 7000000519. The next prime is 7000000537. The reversal of 7000000521 is 1250000007.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7000000521 - 2¹ = 7000000519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7000000521.

It is not an unprimeable number, because it can be changed into a prime (7000000571) 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, 155401 + ... + 195318.

It is an arithmetic number, because the mean of its divisors is an integer number (1166845440).

Almost surely, 2^7000000521 is an apocalyptic number.

It is an amenable number.

7000000521 is a deficient number, since it is larger than the sum of its proper divisors (2334762999).

7000000521 is a wasteful number, since it uses less digits than its factorization.

7000000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357375.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 7000000521 is about 83666.0057669780. The cubic root of 7000000521 is about 1912.9312302313.

Adding to 7000000521 its reverse (1250000007), we get a palindrome (8250000528).

The spelling of 7000000521 in words is "seven billion, five hundred twenty-one", and thus it is an aban number.