161103243 has 8 divisors (see below), whose sum is σ = 245490688. Its totient is φ = 92058984.

The previous prime is 161103233. The next prime is 161103253. The reversal of 161103243 is 342301161.

It is an interprime number because it is at equal distance from previous prime (161103233) and next prime (161103253).

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

It is not a de Polignac number, because 161103243 - 2⁵ = 161103211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 7671583 = 161103243 / (1 + 6 + 1 + 1 + 0 + 3 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161103233) 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, 3835771 + ... + 3835812.

It is an arithmetic number, because the mean of its divisors is an integer number (30686336).

Almost surely, 2^161103243 is an apocalyptic number.

161103243 is a deficient number, since it is larger than the sum of its proper divisors (84387445).

161103243 is an equidigital number, since it uses as much as digits as its factorization.

161103243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7671593.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 161103243 is about 12692.6452325747. The cubic root of 161103243 is about 544.1284422692.

The spelling of 161103243 in words is "one hundred sixty-one million, one hundred three thousand, two hundred forty-three".