216265401 has 12 divisors (see below), whose sum is σ = 340782000. Its totient is φ = 131069880.

The previous prime is 216265363. The next prime is 216265403. The reversal of 216265401 is 104562612.

216265401 is a `hidden beast` number, since 2 + 1 + 6 + 2 + 654 + 0 + 1 = 666.

It is not a de Polignac number, because 216265401 - 2¹⁴ = 216249017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216265403) 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 11 ways as a sum of consecutive naturals, for example, 1092151 + ... + 1092348.

It is an arithmetic number, because the mean of its divisors is an integer number (28398500).

Almost surely, 2^216265401 is an apocalyptic number.

It is an amenable number.

216265401 is a deficient number, since it is larger than the sum of its proper divisors (124516599).

216265401 is a wasteful number, since it uses less digits than its factorization.

216265401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184516 (or 2184513 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 216265401 is about 14705.9648102394. The cubic root of 216265401 is about 600.2456410870.

The spelling of 216265401 in words is "two hundred sixteen million, two hundred sixty-five thousand, four hundred one".