5122543221 has 8 divisors (see below), whose sum is σ = 7588952960. Its totient is φ = 3415028796.

The previous prime is 5122543219. The next prime is 5122543243. The reversal of 5122543221 is 1223452215.

5122543221 is a `hidden beast` number, since 5 + 1 + 225 + 432 + 2 + 1 = 666.

It is not a de Polignac number, because 5122543221 - 2¹ = 5122543219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 189723823 = 5122543221 / (5 + 1 + 2 + 2 + 5 + 4 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5122543291) 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, 94861885 + ... + 94861938.

It is an arithmetic number, because the mean of its divisors is an integer number (948619120).

Almost surely, 2^5122543221 is an apocalyptic number.

It is an amenable number.

5122543221 is a deficient number, since it is larger than the sum of its proper divisors (2466409739).

5122543221 is a wasteful number, since it uses less digits than its factorization.

5122543221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189723832 (or 189723826 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 5122543221 is about 71571.9443706820. The cubic root of 5122543221 is about 1723.8330799725.

Adding to 5122543221 its reverse (1223452215), we get a palindrome (6345995436).

The spelling of 5122543221 in words is "five billion, one hundred twenty-two million, five hundred forty-three thousand, two hundred twenty-one".