161533443 has 8 divisors (see below), whose sum is σ = 215574208. Its totient is φ = 107590824.

The previous prime is 161533423. The next prime is 161533447. The reversal of 161533443 is 344335161.

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

It is not a de Polignac number, because 161533443 - 2⁸ = 161533187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161533443.

It is not an unprimeable number, because it can be changed into a prime (161533447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20605 + ... + 27342.

It is an arithmetic number, because the mean of its divisors is an integer number (26946776).

Almost surely, 2^161533443 is an apocalyptic number.

161533443 is a deficient number, since it is larger than the sum of its proper divisors (54040765).

161533443 is a wasteful number, since it uses less digits than its factorization.

161533443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49073.

The product of its digits is 12960, while the sum is 30.

The square root of 161533443 is about 12709.5807562641. The cubic root of 161533443 is about 544.6123472875.

The spelling of 161533443 in words is "one hundred sixty-one million, five hundred thirty-three thousand, four hundred forty-three".