161316 has 18 divisors (see below), whose sum is σ = 407862. Its totient is φ = 53760.

The previous prime is 161309. The next prime is 161323. The reversal of 161316 is 613161.

It is an interprime number because it is at equal distance from previous prime (161309) and next prime (161323).

It can be written as a sum of positive squares in only one way, i.e., 152100 + 9216 = 390^2 + 96^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

161316 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2205 + ... + 2276.

It is an arithmetic number, because the mean of its divisors is an integer number (22659).

2¹⁶¹³¹⁶ is an apocalyptic number.

It is an amenable number.

161316 is an abundant number, since it is smaller than the sum of its proper divisors (246546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161316 is a wasteful number, since it uses less digits than its factorization.

161316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491 (or 4486 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 161316 is about 401.6416313083. The cubic root of 161316 is about 54.4367866812.

Adding to 161316 its reverse (613161), we get a palindrome (774477).

The spelling of 161316 in words is "one hundred sixty-one thousand, three hundred sixteen".