16212161 has 8 divisors (see below), whose sum is σ = 18959424. Its totient is φ = 13572720.

The previous prime is 16212139. The next prime is 16212173. The reversal of 16212161 is 16121261.

16212161 = T₁₆₆ + T₁₆₇ + ... + T₄₆₆.

16212161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-16212161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16212121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26630 + ... + 27231.

It is an arithmetic number, because the mean of its divisors is an integer number (2369928).

Almost surely, 2^16212161 is an apocalyptic number.

It is an amenable number.

16212161 is a deficient number, since it is larger than the sum of its proper divisors (2747263).

16212161 is an equidigital number, since it uses as much as digits as its factorization.

16212161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53911.

The product of its digits is 144, while the sum is 20.

The square root of 16212161 is about 4026.4327884618. The cubic root of 16212161 is about 253.0930984741.

The spelling of 16212161 in words is "sixteen million, two hundred twelve thousand, one hundred sixty-one".