83005521 has 4 divisors (see below), whose sum is σ = 110674032. Its totient is φ = 55337012.

The previous prime is 83005493. The next prime is 83005529. The reversal of 83005521 is 12550038.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83005521 - 2⁶ = 83005457 is a prime.

It is a super-3 number, since 3×83005521³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83005491 and 83005500.

It is not an unprimeable number, because it can be changed into a prime (83005529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13834251 + ... + 13834256.

It is an arithmetic number, because the mean of its divisors is an integer number (27668508).

Almost surely, 2^83005521 is an apocalyptic number.

It is an amenable number.

83005521 is a deficient number, since it is larger than the sum of its proper divisors (27668511).

83005521 is a wasteful number, since it uses less digits than its factorization.

83005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27668510.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 83005521 is about 9110.7365783454. The cubic root of 83005521 is about 436.2167388154.

Adding to 83005521 its reverse (12550038), we get a palindrome (95555559).

The spelling of 83005521 in words is "eighty-three million, five thousand, five hundred twenty-one".