161043003 has 24 divisors (see below), whose sum is σ = 262519920. Its totient is φ = 94234560.

The previous prime is 161042983. The next prime is 161043011. The reversal of 161043003 is 300340161.

161043003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161043003 - 2⁵ = 161042971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161043083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25176 + ... + 30917.

It is an arithmetic number, because the mean of its divisors is an integer number (10938330).

Almost surely, 2^161043003 is an apocalyptic number.

161043003 is a deficient number, since it is larger than the sum of its proper divisors (101476917).

161043003 is a wasteful number, since it uses less digits than its factorization.

161043003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56139 (or 56136 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 161043003 is about 12690.2719829009. The cubic root of 161043003 is about 544.0606133351.

Adding to 161043003 its reverse (300340161), we get a palindrome (461383164).

The spelling of 161043003 in words is "one hundred sixty-one million, forty-three thousand, three".