83521547 has 4 divisors (see below), whose sum is σ = 83541600. Its totient is φ = 83501496.

The previous prime is 83521519. The next prime is 83521583. The reversal of 83521547 is 74512538.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83521547 - 2¹⁶ = 83456011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83521517) 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 3 ways as a sum of consecutive naturals, for example, 1172 + ... + 12977.

It is an arithmetic number, because the mean of its divisors is an integer number (20885400).

Almost surely, 2^83521547 is an apocalyptic number.

83521547 is a deficient number, since it is larger than the sum of its proper divisors (20053).

83521547 is a wasteful number, since it uses less digits than its factorization.

83521547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20052.

The product of its digits is 33600, while the sum is 35.

The square root of 83521547 is about 9139.0123645829. The cubic root of 83521547 is about 437.1188246747.

Subtracting from 83521547 its reverse (74512538), we obtain a palindrome (9009009).

The spelling of 83521547 in words is "eighty-three million, five hundred twenty-one thousand, five hundred forty-seven".