5525243221 has 4 divisors (see below), whose sum is σ = 5527971072. Its totient is φ = 5522515372.

The previous prime is 5525243203. The next prime is 5525243231. The reversal of 5525243221 is 1223425255.

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 a cyclic number.

It is not a de Polignac number, because 5525243221 - 2¹³ = 5525235029 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 (5525243231) 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, 1360885 + ... + 1364938.

It is an arithmetic number, because the mean of its divisors is an integer number (1381992768).

Almost surely, 2^5525243221 is an apocalyptic number.

It is an amenable number.

5525243221 is a deficient number, since it is larger than the sum of its proper divisors (2727851).

5525243221 is a wasteful number, since it uses less digits than its factorization.

5525243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727850.

The product of its digits is 24000, while the sum is 31.

The square root of 5525243221 is about 74331.9798000834. The cubic root of 5525243221 is about 1767.8705728103.

Adding to 5525243221 its reverse (1223425255), we get a palindrome (6748668476).

The spelling of 5525243221 in words is "five billion, five hundred twenty-five million, two hundred forty-three thousand, two hundred twenty-one".