65161217 has 8 divisors (see below), whose sum is σ = 71283072. Its totient is φ = 59072400.

The previous prime is 65161189. The next prime is 65161247. The reversal of 65161217 is 71216156.

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

It is a cyclic number.

It is not a de Polignac number, because 65161217 - 2⁸ = 65160961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65161217.

It is not an unprimeable number, because it can be changed into a prime (65161247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4034 + ... + 12107.

It is an arithmetic number, because the mean of its divisors is an integer number (8910384).

Almost surely, 2^65161217 is an apocalyptic number.

It is an amenable number.

65161217 is a deficient number, since it is larger than the sum of its proper divisors (6121855).

65161217 is a wasteful number, since it uses less digits than its factorization.

65161217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16519.

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

The square root of 65161217 is about 8072.2498103069. The cubic root of 65161217 is about 402.4047164601.

The spelling of 65161217 in words is "sixty-five million, one hundred sixty-one thousand, two hundred seventeen".