5205415221 has 6 divisors (see below), whose sum is σ = 7518933110. Its totient is φ = 3470276808.

The previous prime is 5205415219. The next prime is 5205415231. The reversal of 5205415221 is 1225145025.

5205415221 is a `hidden beast` number, since 5 + 20 + 5 + 415 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4568408100 + 637007121 = 67590^2 + 25239^2 .

It is not a de Polignac number, because 5205415221 - 2¹ = 5205415219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205415231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289189726 + ... + 289189743.

Almost surely, 2^5205415221 is an apocalyptic number.

It is an amenable number.

5205415221 is a deficient number, since it is larger than the sum of its proper divisors (2313517889).

5205415221 is a wasteful number, since it uses less digits than its factorization.

5205415221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578379475 (or 578379472 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 5205415221 is about 72148.5635407941. The cubic root of 5205415221 is about 1733.0793964246.

The spelling of 5205415221 in words is "five billion, two hundred five million, four hundred fifteen thousand, two hundred twenty-one".