161023155 has 8 divisors (see below), whose sum is σ = 257637072. Its totient is φ = 85879008.

The previous prime is 161023153. The next prime is 161023183. The reversal of 161023155 is 551320161.

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

It is not a de Polignac number, because 161023155 - 2¹ = 161023153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161023153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5367424 + ... + 5367453.

It is an arithmetic number, because the mean of its divisors is an integer number (32204634).

Almost surely, 2^161023155 is an apocalyptic number.

161023155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161023155 is a deficient number, since it is larger than the sum of its proper divisors (96613917).

161023155 is a wasteful number, since it uses less digits than its factorization.

161023155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10734885.

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

The square root of 161023155 is about 12689.4899424681. The cubic root of 161023155 is about 544.0382612128.

The spelling of 161023155 in words is "one hundred sixty-one million, twenty-three thousand, one hundred fifty-five".