2205071521 has 8 divisors (see below), whose sum is σ = 2284430400. Its totient is φ = 2125934160.

The previous prime is 2205071503. The next prime is 2205071527. The reversal of 2205071521 is 1251705022.

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 2205071521 - 2¹⁷ = 2204940449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2205071527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34981 + ... + 75058.

It is an arithmetic number, because the mean of its divisors is an integer number (285553800).

Almost surely, 2^2205071521 is an apocalyptic number.

It is an amenable number.

2205071521 is a deficient number, since it is larger than the sum of its proper divisors (79358879).

2205071521 is a wasteful number, since it uses less digits than its factorization.

2205071521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110759.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 2205071521 is about 46958.1890728337. The cubic root of 2205071521 is about 1301.5900703191.

Adding to 2205071521 its reverse (1251705022), we get a palindrome (3456776543).

The spelling of 2205071521 in words is "two billion, two hundred five million, seventy-one thousand, five hundred twenty-one".