161173130 has 16 divisors (see below), whose sum is σ = 290402280. Its totient is φ = 64404672.

The previous prime is 161173109. The next prime is 161173157. The reversal of 161173130 is 31371161.

161173130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 80478841 + 80694289 = 8971^2 + 8983^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161173096 and 161173105.

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, 3152 + ... + 18228.

Almost surely, 2^161173130 is an apocalyptic number.

161173130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161173130 is a deficient number, since it is larger than the sum of its proper divisors (129229150).

161173130 is a wasteful number, since it uses less digits than its factorization.

161173130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16153.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 161173130 is about 12695.3979850968. The cubic root of 161173130 is about 544.2071123324.

The spelling of 161173130 in words is "one hundred sixty-one million, one hundred seventy-three thousand, one hundred thirty".