165115417 has 2 divisors, whose sum is σ = 165115418. Its totient is φ = 165115416.

The previous prime is 165115387. The next prime is 165115429. The reversal of 165115417 is 714511561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96904336 + 68211081 = 9844^2 + 8259^2 .

It is a cyclic number.

It is not a de Polignac number, because 165115417 - 2⁷ = 165115289 is a prime.

It is not a weakly prime, because it can be changed into another prime (165115477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82557708 + 82557709.

It is an arithmetic number, because the mean of its divisors is an integer number (82557709).

Almost surely, 2^165115417 is an apocalyptic number.

It is an amenable number.

165115417 is a deficient number, since it is larger than the sum of its proper divisors (1).

165115417 is an equidigital number, since it uses as much as digits as its factorization.

165115417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 31.

The square root of 165115417 is about 12849.7243939316. The cubic root of 165115417 is about 548.6085122881.

Adding to 165115417 its reverse (714511561), we get a palindrome (879626978).

The spelling of 165115417 in words is "one hundred sixty-five million, one hundred fifteen thousand, four hundred seventeen".