216405411 has 8 divisors (see below), whose sum is σ = 292193280. Its totient is φ = 142443912.

The previous prime is 216405407. The next prime is 216405433. The reversal of 216405411 is 114504612.

It is a happy number.

216405411 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 not a de Polignac number, because 216405411 - 2² = 216405407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216405401) 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, 456315 + ... + 456788.

It is an arithmetic number, because the mean of its divisors is an integer number (36524160).

Almost surely, 2^216405411 is an apocalyptic number.

216405411 is a deficient number, since it is larger than the sum of its proper divisors (75787869).

216405411 is an equidigital number, since it uses as much as digits as its factorization.

216405411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913185.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 216405411 is about 14710.7243533417. The cubic root of 216405411 is about 600.3751459492.

The spelling of 216405411 in words is "two hundred sixteen million, four hundred five thousand, four hundred eleven".