216426161 has 16 divisors (see below), whose sum is σ = 251252736. Its totient is φ = 182601216.

The previous prime is 216426157. The next prime is 216426187. The reversal of 216426161 is 161624612.

It is not a de Polignac number, because 216426161 - 2² = 216426157 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216426121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120905 + ... + 122681.

It is an arithmetic number, because the mean of its divisors is an integer number (15703296).

Almost surely, 2^216426161 is an apocalyptic number.

It is an amenable number.

216426161 is a deficient number, since it is larger than the sum of its proper divisors (34826575).

216426161 is a wasteful number, since it uses less digits than its factorization.

216426161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048.

The product of its digits is 3456, while the sum is 29.

The square root of 216426161 is about 14711.4296042227. The cubic root of 216426161 is about 600.3943342958.

The spelling of 216426161 in words is "two hundred sixteen million, four hundred twenty-six thousand, one hundred sixty-one".