2104515221 has 8 divisors (see below), whose sum is σ = 2345590080. Its totient is φ = 1876471488.

The previous prime is 2104515169. The next prime is 2104515223. The reversal of 2104515221 is 1225154012.

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 2104515221 - 2¹⁰ = 2104514197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104515223) 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 7 ways as a sum of consecutive naturals, for example, 3257441 + ... + 3258086.

It is an arithmetic number, because the mean of its divisors is an integer number (293198760).

Almost surely, 2^2104515221 is an apocalyptic number.

It is an amenable number.

2104515221 is a deficient number, since it is larger than the sum of its proper divisors (241074859).

2104515221 is a wasteful number, since it uses less digits than its factorization.

2104515221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6515563.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2104515221 is about 45874.9955967300. The cubic root of 2104515221 is about 1281.4963013115.

Adding to 2104515221 its reverse (1225154012), we get a palindrome (3329669233).

The spelling of 2104515221 in words is "two billion, one hundred four million, five hundred fifteen thousand, two hundred twenty-one".