7521315025 has 18 divisors (see below), whose sum is σ = 10849114950. Its totient is φ = 5157472320.

The previous prime is 7521315017. The next prime is 7521315041. The reversal of 7521315025 is 5205131257.

It can be written as a sum of positive squares in 3 ways, for example, as 27123264 + 7494191761 = 5208^2 + 86569^2 .

It is not a de Polignac number, because 7521315025 - 2³ = 7521315017 is a prime.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 3068700 + ... + 3071149.

Almost surely, 2^7521315025 is an apocalyptic number.

It is an amenable number.

7521315025 is a deficient number, since it is larger than the sum of its proper divisors (3327799925).

7521315025 is a wasteful number, since it uses less digits than its factorization.

7521315025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139873 (or 6139861 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 7521315025 is about 86725.5154207803. The cubic root of 7521315025 is about 1959.2864111494.

The spelling of 7521315025 in words is "seven billion, five hundred twenty-one million, three hundred fifteen thousand, twenty-five".