217068137 has 16 divisors (see below), whose sum is σ = 260451072. Its totient is φ = 178273920.

The previous prime is 217068127. The next prime is 217068151. The reversal of 217068137 is 731860712.

It is not a de Polignac number, because 217068137 - 2⁸ = 217067881 is a prime.

It is a super-2 number, since 2×217068137² = 94237152201301538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217068097 and 217068106.

It is not an unprimeable number, because it can be changed into a prime (217068127) 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 15 ways as a sum of consecutive naturals, for example, 9428 + ... + 22869.

It is an arithmetic number, because the mean of its divisors is an integer number (16278192).

Almost surely, 2^217068137 is an apocalyptic number.

It is an amenable number.

217068137 is a deficient number, since it is larger than the sum of its proper divisors (43382935).

217068137 is a wasteful number, since it uses less digits than its factorization.

217068137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32368.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 217068137 is about 14733.2324016151. The cubic root of 217068137 is about 600.9873899512.

It can be divided in two parts, 2170 and 68137, that added together give a palindrome (70307).

The spelling of 217068137 in words is "two hundred seventeen million, sixty-eight thousand, one hundred thirty-seven".