5205452221 has 4 divisors (see below), whose sum is σ = 5223977244. Its totient is φ = 5186927200.

The previous prime is 5205452201. The next prime is 5205452227. The reversal of 5205452221 is 1222545025.

5205452221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3790864900 + 1414587321 = 61570^2 + 37611^2 .

It is a cyclic number.

It is not a de Polignac number, because 5205452221 - 2⁷ = 5205452093 is a prime.

It is a super-2 number, since 2×5205452221² = 54193465650227665682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5205452221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205452227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9262090 + ... + 9262651.

It is an arithmetic number, because the mean of its divisors is an integer number (1305994311).

Almost surely, 2^5205452221 is an apocalyptic number.

It is an amenable number.

5205452221 is a deficient number, since it is larger than the sum of its proper divisors (18525023).

5205452221 is a wasteful number, since it uses less digits than its factorization.

5205452221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18525022.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 5205452221 is about 72148.8199556999. The cubic root of 5205452221 is about 1733.0835026475.

Adding to 5205452221 its reverse (1222545025), we get a palindrome (6427997246).

The spelling of 5205452221 in words is "five billion, two hundred five million, four hundred fifty-two thousand, two hundred twenty-one".