117216065 has 16 divisors (see below), whose sum is σ = 144936000. Its totient is φ = 90952512.

The previous prime is 117216023. The next prime is 117216079. The reversal of 117216065 is 560612711.

117216065 = 1630² + 1631² + ... + 1672².

It is a cyclic number.

It is not a de Polignac number, because 117216065 - 2¹⁰ = 117215041 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30206 + ... + 33864.

It is an arithmetic number, because the mean of its divisors is an integer number (9058500).

Almost surely, 2^117216065 is an apocalyptic number.

It is an amenable number.

117216065 is a deficient number, since it is larger than the sum of its proper divisors (27719935).

117216065 is a wasteful number, since it uses less digits than its factorization.

117216065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 117216065 is about 10826.6368277503. The cubic root of 117216065 is about 489.3982130516.

Adding to 117216065 its reverse (560612711), we get a palindrome (677828776).

It can be divided in two parts, 117 and 216065, that multiplied together give a triangular number (25279605 = T₇₁₁₀).

The spelling of 117216065 in words is "one hundred seventeen million, two hundred sixteen thousand, sixty-five".