161354155 has 4 divisors (see below), whose sum is σ = 193624992. Its totient is φ = 129083320.

The previous prime is 161354153. The next prime is 161354161. The reversal of 161354155 is 551453161.

It is a happy number.

161354155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551453161 = 7 ⋅78779023.

It is not a de Polignac number, because 161354155 - 2¹ = 161354153 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161354153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16135411 + ... + 16135420.

It is an arithmetic number, because the mean of its divisors is an integer number (48406248).

Almost surely, 2^161354155 is an apocalyptic number.

161354155 is a deficient number, since it is larger than the sum of its proper divisors (32270837).

161354155 is an equidigital number, since it uses as much as digits as its factorization.

161354155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32270836.

The product of its digits is 9000, while the sum is 31.

The square root of 161354155 is about 12702.5255362861. The cubic root of 161354155 is about 544.4107819979.

The spelling of 161354155 in words is "one hundred sixty-one million, three hundred fifty-four thousand, one hundred fifty-five".