161043155 has 48 divisors (see below), whose sum is σ = 246486240. Its totient is φ = 100090368.

The previous prime is 161043151. The next prime is 161043163. The reversal of 161043155 is 551340161.

161043155 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 161043155 - 2² = 161043151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161043151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187487 + ... + 188343.

It is an arithmetic number, because the mean of its divisors is an integer number (5135130).

Almost surely, 2^161043155 is an apocalyptic number.

161043155 is a deficient number, since it is larger than the sum of its proper divisors (85443085).

161043155 is a wasteful number, since it uses less digits than its factorization.

161043155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 161043155 is about 12690.2779717388. The cubic root of 161043155 is about 544.0607845051.

The spelling of 161043155 in words is "one hundred sixty-one million, forty-three thousand, one hundred fifty-five".