396216213 has 4 divisors (see below), whose sum is σ = 528288288. Its totient is φ = 264144140.

The previous prime is 396216209. The next prime is 396216257. The reversal of 396216213 is 312612693.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312612693 = 3 ⋅104204231.

It is a cyclic number.

It is not a de Polignac number, because 396216213 - 2² = 396216209 is a prime.

It is a super-2 number, since 2×396216213² = 313974574888122738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396216283) 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, 66036033 + ... + 66036038.

It is an arithmetic number, because the mean of its divisors is an integer number (132072072).

Almost surely, 2^396216213 is an apocalyptic number.

It is an amenable number.

396216213 is a deficient number, since it is larger than the sum of its proper divisors (132072075).

396216213 is a wasteful number, since it uses less digits than its factorization.

396216213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132072074.

The product of its digits is 11664, while the sum is 33.

The square root of 396216213 is about 19905.1805568299. The cubic root of 396216213 is about 734.4756702867.

The spelling of 396216213 in words is "three hundred ninety-six million, two hundred sixteen thousand, two hundred thirteen".