161165103 has 24 divisors (see below), whose sum is σ = 240683184. Its totient is φ = 95821440.

The previous prime is 161165077. The next prime is 161165113. The reversal of 161165103 is 301561161.

It is not a de Polignac number, because 161165103 - 2¹⁰ = 161164079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161165113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15051 + ... + 23427.

It is an arithmetic number, because the mean of its divisors is an integer number (10028466).

Almost surely, 2^161165103 is an apocalyptic number.

161165103 is a deficient number, since it is larger than the sum of its proper divisors (79518081).

161165103 is a wasteful number, since it uses less digits than its factorization.

161165103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8455 (or 8444 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 161165103 is about 12695.0818429816. The cubic root of 161165103 is about 544.1980776937.

The spelling of 161165103 in words is "one hundred sixty-one million, one hundred sixty-five thousand, one hundred three".