216466413 has 4 divisors (see below), whose sum is σ = 288621888. Its totient is φ = 144310940.

The previous prime is 216466403. The next prime is 216466427. The reversal of 216466413 is 314664612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216466413 - 2⁵ = 216466381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216466403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36077733 + ... + 36077738.

It is an arithmetic number, because the mean of its divisors is an integer number (72155472).

Almost surely, 2^216466413 is an apocalyptic number.

It is an amenable number.

216466413 is a deficient number, since it is larger than the sum of its proper divisors (72155475).

216466413 is an equidigital number, since it uses as much as digits as its factorization.

216466413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72155474.

The product of its digits is 20736, while the sum is 33.

The square root of 216466413 is about 14712.7975925723. The cubic root of 216466413 is about 600.4315534172.

The spelling of 216466413 in words is "two hundred sixteen million, four hundred sixty-six thousand, four hundred thirteen".