217215202182052 has 12 divisors (see below), whose sum is σ = 393234417743580. Its totient is φ = 104862511398176.

The previous prime is 217215202181981. The next prime is 217215202182089. The reversal of 217215202182052 is 250281202512712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 159632510699776 + 57582691482276 = 12634576^2 + 7588326^2 .

It is a super-3 number, since 3×217215202182052³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217215202181996 and 217215202182014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 936272423083 + ... + 936272423314.

It is an arithmetic number, because the mean of its divisors is an integer number (32769534811965).

Almost surely, 2^{217215202182052} is an apocalyptic number.

It is an amenable number.

217215202182052 is a deficient number, since it is larger than the sum of its proper divisors (176019215561528).

217215202182052 is a wasteful number, since it uses less digits than its factorization.

217215202182052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872544846430 (or 1872544846428 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

Adding to 217215202182052 its reverse (250281202512712), we get a palindrome (467496404694764).

The spelling of 217215202182052 in words is "two hundred seventeen trillion, two hundred fifteen billion, two hundred two million, one hundred eighty-two thousand, fifty-two".