5205533221 has 4 divisors (see below), whose sum is σ = 5949180832. Its totient is φ = 4461885612.

The previous prime is 5205533191. The next prime is 5205533251. The reversal of 5205533221 is 1223355025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (5205533191) and next prime (5205533251).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5205533221 is a prime.

It is a super-2 number, since 2×5205533221² = 54195152229869269682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5205533221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205533251) 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, 371823795 + ... + 371823808.

It is an arithmetic number, because the mean of its divisors is an integer number (1487295208).

Almost surely, 2^5205533221 is an apocalyptic number.

It is an amenable number.

5205533221 is a deficient number, since it is larger than the sum of its proper divisors (743647611).

5205533221 is an equidigital number, since it uses as much as digits as its factorization.

5205533221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743647610.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 5205533221 is about 72149.3812932585. The cubic root of 5205533221 is about 1733.0924918784.

Adding to 5205533221 its reverse (1223355025), we get a palindrome (6428888246).

The spelling of 5205533221 in words is "five billion, two hundred five million, five hundred thirty-three thousand, two hundred twenty-one".