5252423221 has 16 divisors (see below), whose sum is σ = 5588352000. Its totient is φ = 4926417408.

The previous prime is 5252423153. The next prime is 5252423227. The reversal of 5252423221 is 1223242525.

It is a cyclic number.

It is not a de Polignac number, because 5252423221 - 2²³ = 5244034613 is a prime.

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 5252423221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5252423227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232380 + ... + 253978.

It is an arithmetic number, because the mean of its divisors is an integer number (349272000).

Almost surely, 2^5252423221 is an apocalyptic number.

It is an amenable number.

5252423221 is a deficient number, since it is larger than the sum of its proper divisors (335928779).

5252423221 is a wasteful number, since it uses less digits than its factorization.

5252423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21828.

The product of its digits is 9600, while the sum is 28.

The square root of 5252423221 is about 72473.6036153854. The cubic root of 5252423221 is about 1738.2806838764.

Adding to 5252423221 its reverse (1223242525), we get a palindrome (6475665746).

The spelling of 5252423221 in words is "five billion, two hundred fifty-two million, four hundred twenty-three thousand, two hundred twenty-one".