216455407 has 16 divisors (see below), whose sum is σ = 262343232. Its totient is φ = 174343680.

The previous prime is 216455399. The next prime is 216455411. The reversal of 216455407 is 704554612.

It is not a de Polignac number, because 216455407 - 2³ = 216455399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216455417) 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, 111013 + ... + 112945.

It is an arithmetic number, because the mean of its divisors is an integer number (16396452).

Almost surely, 2^216455407 is an apocalyptic number.

216455407 is a deficient number, since it is larger than the sum of its proper divisors (45887825).

216455407 is a wasteful number, since it uses less digits than its factorization.

216455407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 216455407 is about 14712.4235596995. The cubic root of 216455407 is about 600.4213771477.

The spelling of 216455407 in words is "two hundred sixteen million, four hundred fifty-five thousand, four hundred seven".