161330155 has 8 divisors (see below), whose sum is σ = 221252832. Its totient is φ = 110626368.

The previous prime is 161330149. The next prime is 161330173. The reversal of 161330155 is 551033161.

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

It is a cyclic number.

It is not a de Polignac number, because 161330155 - 2⁵ = 161330123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2304682 + ... + 2304751.

It is an arithmetic number, because the mean of its divisors is an integer number (27656604).

Almost surely, 2^161330155 is an apocalyptic number.

161330155 is a deficient number, since it is larger than the sum of its proper divisors (59922677).

161330155 is an equidigital number, since it uses as much as digits as its factorization.

161330155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609445.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 161330155 is about 12701.5808071279. The cubic root of 161330155 is about 544.3837885671.

The spelling of 161330155 in words is "one hundred sixty-one million, three hundred thirty thousand, one hundred fifty-five".