161103543 has 16 divisors (see below), whose sum is σ = 228324096. Its totient is φ = 100691840.

The previous prime is 161103541. The next prime is 161103557. The reversal of 161103543 is 345301161.

It is a cyclic number.

It is not a de Polignac number, because 161103543 - 2¹ = 161103541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161103541) 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 15 ways as a sum of consecutive naturals, for example, 7408 + ... + 19418.

It is an arithmetic number, because the mean of its divisors is an integer number (14270256).

Almost surely, 2^161103543 is an apocalyptic number.

161103543 is a deficient number, since it is larger than the sum of its proper divisors (67220553).

161103543 is a wasteful number, since it uses less digits than its factorization.

161103543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12294.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 161103543 is about 12692.6570504367. The cubic root of 161103543 is about 544.1287800203.

The spelling of 161103543 in words is "one hundred sixty-one million, one hundred three thousand, five hundred forty-three".