217333020136 has 32 divisors (see below), whose sum is σ = 409972755240. Its totient is φ = 108007314688.

The previous prime is 217333020131. The next prime is 217333020173. The reversal of 217333020136 is 631020333712.

217333020136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 184392948100 + 32940072036 = 429410^2 + 181494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 217333020098 and 217333020107.

It is not an unprimeable number, because it can be changed into a prime (217333020131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5234370 + ... + 5275726.

Almost surely, 2^217333020136 is an apocalyptic number.

It is an amenable number.

217333020136 is a deficient number, since it is larger than the sum of its proper divisors (192639735104).

217333020136 is a wasteful number, since it uses less digits than its factorization.

217333020136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45333 (or 45329 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 31.

Adding to 217333020136 its reverse (631020333712), we get a palindrome (848353353848).

The spelling of 217333020136 in words is "two hundred seventeen billion, three hundred thirty-three million, twenty thousand, one hundred thirty-six".