9521539442 has 8 divisors (see below), whose sum is σ = 14333136732. Its totient is φ = 4743827200.

The previous prime is 9521539441. The next prime is 9521539453. The reversal of 9521539442 is 2449351259.

It is a happy number.

9521539442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8693884081 + 827655361 = 93241^2 + 28769^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 9521539393 and 9521539402.

It is not an unprimeable number, because it can be changed into a prime (9521539441) 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 3 ways as a sum of consecutive naturals, for example, 8470559 + ... + 8471682.

Almost surely, 2^9521539442 is an apocalyptic number.

9521539442 is a deficient number, since it is larger than the sum of its proper divisors (4811597290).

9521539442 is a wasteful number, since it uses less digits than its factorization.

9521539442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16942524.

The product of its digits is 388800, while the sum is 44.

The square root of 9521539442 is about 97578.3758934325. The cubic root of 9521539442 is about 2119.5112378951.

The spelling of 9521539442 in words is "nine billion, five hundred twenty-one million, five hundred thirty-nine thousand, four hundred forty-two".