161346205 has 4 divisors (see below), whose sum is σ = 193615452. Its totient is φ = 129076960.

The previous prime is 161346181. The next prime is 161346221. The reversal of 161346205 is 502643161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91757241 + 69588964 = 9579^2 + 8342^2 .

It is not a de Polignac number, because 161346205 - 2¹⁵ = 161313437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16134616 + ... + 16134625.

It is an arithmetic number, because the mean of its divisors is an integer number (48403863).

Almost surely, 2^161346205 is an apocalyptic number.

It is an amenable number.

161346205 is a deficient number, since it is larger than the sum of its proper divisors (32269247).

161346205 is an equidigital number, since it uses as much as digits as its factorization.

161346205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32269246.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 161346205 is about 12702.2126025350. The cubic root of 161346205 is about 544.4018407204.

Adding to 161346205 its reverse (502643161), we get a palindrome (663989366).

The spelling of 161346205 in words is "one hundred sixty-one million, three hundred forty-six thousand, two hundred five".