52220217 has 8 divisors (see below), whose sum is σ = 79573696. Its totient is φ = 29840112.

The previous prime is 52220177. The next prime is 52220219. The reversal of 52220217 is 71202225.

It is a happy number.

52220217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52220217 - 2¹⁵ = 52187449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2486677 = 52220217 / (5 + 2 + 2 + 2 + 0 + 2 + 1 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52220193 and 52220202.

It is not an unprimeable number, because it can be changed into a prime (52220219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243318 + ... + 1243359.

It is an arithmetic number, because the mean of its divisors is an integer number (9946712).

Almost surely, 2^52220217 is an apocalyptic number.

It is an amenable number.

52220217 is a deficient number, since it is larger than the sum of its proper divisors (27353479).

52220217 is a wasteful number, since it uses less digits than its factorization.

52220217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486687.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 52220217 is about 7226.3557205551. The cubic root of 52220217 is about 373.7772726116. Note that the first 3 decimals are identical.

It can be divided in two parts, 5 and 2220217, that added together give a palindrome (2220222).

The spelling of 52220217 in words is "fifty-two million, two hundred twenty thousand, two hundred seventeen".