9531481521 has 8 divisors (see below), whose sum is σ = 12714757344. Its totient is φ = 6351263360.

The previous prime is 9531481507. The next prime is 9531481567. The reversal of 9531481521 is 1251841359.

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

It is a cyclic number.

It is not a de Polignac number, because 9531481521 - 2⁶ = 9531481457 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9531481521.

It is not an unprimeable number, because it can be changed into a prime (9531481571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757131 + ... + 769616.

It is an arithmetic number, because the mean of its divisors is an integer number (1589344668).

Almost surely, 2^9531481521 is an apocalyptic number.

It is an amenable number.

9531481521 is a deficient number, since it is larger than the sum of its proper divisors (3183275823).

9531481521 is a wasteful number, since it uses less digits than its factorization.

9531481521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528831.

The product of its digits is 43200, while the sum is 39.

The square root of 9531481521 is about 97629.3066706919. The cubic root of 9531481521 is about 2120.2486893053.

The spelling of 9531481521 in words is "nine billion, five hundred thirty-one million, four hundred eighty-one thousand, five hundred twenty-one".