165481117 has 4 divisors (see below), whose sum is σ = 165876480. Its totient is φ = 165085756.

The previous prime is 165481109. The next prime is 165481123. The reversal of 165481117 is 711184561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 711184561 = 109 ⋅6524629.

It is a cyclic number.

It is not a de Polignac number, because 165481117 - 2³ = 165481109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165481517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197053 + ... + 197890.

It is an arithmetic number, because the mean of its divisors is an integer number (41469120).

Almost surely, 2^165481117 is an apocalyptic number.

It is an amenable number.

165481117 is a deficient number, since it is larger than the sum of its proper divisors (395363).

165481117 is an equidigital number, since it uses as much as digits as its factorization.

165481117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395362.

The product of its digits is 6720, while the sum is 34.

The square root of 165481117 is about 12863.9464006968. The cubic root of 165481117 is about 549.0132356467.

The spelling of 165481117 in words is "one hundred sixty-five million, four hundred eighty-one thousand, one hundred seventeen".