5221166444 has 72 divisors (see below), whose sum is σ = 10356054912. Its totient is φ = 2299415040.

The previous prime is 5221166437. The next prime is 5221166449. The reversal of 5221166444 is 4446611225.

It is not an unprimeable number, because it can be changed into a prime (5221166449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1528082 + ... + 1531494.

It is an arithmetic number, because the mean of its divisors is an integer number (143834096).

Almost surely, 2^5221166444 is an apocalyptic number.

It is an amenable number.

5221166444 is a deficient number, since it is larger than the sum of its proper divisors (5134888468).

5221166444 is a wasteful number, since it uses less digits than its factorization.

5221166444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547 (or 3532 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 5221166444 is about 72257.6393469922. The cubic root of 5221166444 is about 1734.8256952959.

Adding to 5221166444 its reverse (4446611225), we get a palindrome (9667777669).

The spelling of 5221166444 in words is "five billion, two hundred twenty-one million, one hundred sixty-six thousand, four hundred forty-four".