65471217 has 16 divisors (see below), whose sum is σ = 100797312. Its totient is φ = 37025280.

The previous prime is 65471213. The next prime is 65471221. The reversal of 65471217 is 71217456.

It is an interprime number because it is at equal distance from previous prime (65471213) and next prime (65471221).

It is not a de Polignac number, because 65471217 - 2² = 65471213 is a prime.

It is a super-2 number, since 2×65471217² = 8572960510922178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65471213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14034 + ... + 18107.

It is an arithmetic number, because the mean of its divisors is an integer number (6299832).

Almost surely, 2^65471217 is an apocalyptic number.

It is an amenable number.

65471217 is a deficient number, since it is larger than the sum of its proper divisors (35326095).

65471217 is a wasteful number, since it uses less digits than its factorization.

65471217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32248.

The product of its digits is 11760, while the sum is 33.

The square root of 65471217 is about 8091.4286130448. The cubic root of 65471217 is about 403.0418447315.

The spelling of 65471217 in words is "sixty-five million, four hundred seventy-one thousand, two hundred seventeen".