161214161 has 8 divisors (see below), whose sum is σ = 168306600. Its totient is φ = 154224000.

The previous prime is 161214101. The next prime is 161214169. The reversal of 161214161 is 161412161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62331025 + 98883136 = 7895^2 + 9944^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161214161 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161214169) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22340 + ... + 28661.

It is an arithmetic number, because the mean of its divisors is an integer number (21038325).

Almost surely, 2^161214161 is an apocalyptic number.

It is an amenable number.

161214161 is a deficient number, since it is larger than the sum of its proper divisors (7092439).

161214161 is a wasteful number, since it uses less digits than its factorization.

161214161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51139.

The product of its digits is 288, while the sum is 23.

The square root of 161214161 is about 12697.0138615345. The cubic root of 161214161 is about 544.2532893171.

The spelling of 161214161 in words is "one hundred sixty-one million, two hundred fourteen thousand, one hundred sixty-one".