161144315 has 4 divisors (see below), whose sum is σ = 193373184. Its totient is φ = 128915448.

The previous prime is 161144311. The next prime is 161144317. The reversal of 161144315 is 513441161.

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

It is a cyclic number.

It is not a de Polignac number, because 161144315 - 2² = 161144311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161144311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16114427 + ... + 16114436.

It is an arithmetic number, because the mean of its divisors is an integer number (48343296).

Almost surely, 2^161144315 is an apocalyptic number.

161144315 is a deficient number, since it is larger than the sum of its proper divisors (32228869).

161144315 is an equidigital number, since it uses as much as digits as its factorization.

161144315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32228868.

The product of its digits is 1440, while the sum is 26.

The square root of 161144315 is about 12694.2630743183. The cubic root of 161144315 is about 544.1746787571.

Adding to 161144315 its reverse (513441161), we get a palindrome (674585476).

The spelling of 161144315 in words is "one hundred sixty-one million, one hundred forty-four thousand, three hundred fifteen".