83102521 has 4 divisors (see below), whose sum is σ = 83123172. Its totient is φ = 83081872.

The previous prime is 83102491. The next prime is 83102597. The reversal of 83102521 is 12520138.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81198121 + 1904400 = 9011^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 83102521 - 2⁵ = 83102489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83102492 and 83102501.

It is not an unprimeable number, because it can be changed into a prime (83102221) 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, 2110 + ... + 13063.

It is an arithmetic number, because the mean of its divisors is an integer number (20780793).

Almost surely, 2^83102521 is an apocalyptic number.

It is an amenable number.

83102521 is a deficient number, since it is larger than the sum of its proper divisors (20651).

83102521 is a wasteful number, since it uses less digits than its factorization.

83102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20650.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 83102521 is about 9116.0584135908. The cubic root of 83102521 is about 436.3865931880.

Adding to 83102521 its reverse (12520138), we get a palindrome (95622659).

The spelling of 83102521 in words is "eighty-three million, one hundred two thousand, five hundred twenty-one".