5220000 has 180 divisors, whose sum is σ = 19189170. Its totient is φ = 1344000.

The previous prime is 5219959. The next prime is 5220001. The reversal of 5220000 is 225.

It can be written as a sum of positive squares in 5 ways, for example, as 76176 + 5143824 = 276^2 + 2268^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (5220001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 179986 + ... + 180014.

Almost surely, 2^5220000 is an apocalyptic number.

5220000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9594585).

5220000 is an abundant number, since it is smaller than the sum of its proper divisors (13969170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5220000 is a wasteful number, since it uses less digits than its factorization.

5220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 5220000 is about 2284.7319317592. The cubic root of 5220000 is about 173.4696495065.

Adding to 5220000 its reverse (225), we get a palindrome (5220225).

The spelling of 5220000 in words is "five million, two hundred twenty thousand".