161346305 has 4 divisors (see below), whose sum is σ = 193615572. Its totient is φ = 129077040.

The previous prime is 161346287. The next prime is 161346313. The reversal of 161346305 is 503643161.

It is a happy number.

161346305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503643161 = 7 ⋅71949023.

It can be written as a sum of positive squares in 2 ways, for example, as 53684929 + 107661376 = 7327^2 + 10376^2 .

It is not a de Polignac number, because 161346305 - 2²⁰ = 160297729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16134626 + ... + 16134635.

It is an arithmetic number, because the mean of its divisors is an integer number (48403893).

Almost surely, 2^161346305 is an apocalyptic number.

It is an amenable number.

161346305 is a deficient number, since it is larger than the sum of its proper divisors (32269267).

161346305 is an equidigital number, since it uses as much as digits as its factorization.

161346305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32269266.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 161346305 is about 12702.2165388565. The cubic root of 161346305 is about 544.4019531912.

Adding to 161346305 its reverse (503643161), we get a palindrome (664989466).

The spelling of 161346305 in words is "one hundred sixty-one million, three hundred forty-six thousand, three hundred five".