7521327081 has 6 divisors (see below), whose sum is σ = 10864139130. Its totient is φ = 5014218048.

The previous prime is 7521327053. The next prime is 7521327089. The reversal of 7521327081 is 1807231257.

It can be written as a sum of positive squares in only one way, i.e., 5358240000 + 2163087081 = 73200^2 + 46509^2 .

It is not a de Polignac number, because 7521327081 - 2⁹ = 7521326569 is a prime.

It is a super-2 number, since 2×7521327081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7521327089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 417851496 + ... + 417851513.

It is an arithmetic number, because the mean of its divisors is an integer number (1810689855).

Almost surely, 2^7521327081 is an apocalyptic number.

It is an amenable number.

7521327081 is a deficient number, since it is larger than the sum of its proper divisors (3342812049).

7521327081 is a wasteful number, since it uses less digits than its factorization.

7521327081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835703015 (or 835703012 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 7521327081 is about 86725.5849274019. The cubic root of 7521327081 is about 1959.2874580028.

The spelling of 7521327081 in words is "seven billion, five hundred twenty-one million, three hundred twenty-seven thousand, eighty-one".