320155161 has 8 divisors (see below), whose sum is σ = 431670240. Its totient is φ = 211038432.

The previous prime is 320155159. The next prime is 320155217. The reversal of 320155161 is 161551023.

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

It is not a de Polignac number, because 320155161 - 2¹ = 320155159 is a prime.

It is a super-2 number, since 2×320155161² = 204998654229871842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320155061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599275 + ... + 599808.

It is an arithmetic number, because the mean of its divisors is an integer number (53958780).

Almost surely, 2^320155161 is an apocalyptic number.

It is an amenable number.

320155161 is a deficient number, since it is larger than the sum of its proper divisors (111515079).

320155161 is a wasteful number, since it uses less digits than its factorization.

320155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199175.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 320155161 is about 17892.8801762042. The cubic root of 320155161 is about 684.1009114651.

The spelling of 320155161 in words is "three hundred twenty million, one hundred fifty-five thousand, one hundred sixty-one".