320466213 has 42 divisors (see below), whose sum is σ = 498034194. Its totient is φ = 205962912.

The previous prime is 320466187. The next prime is 320466227. The reversal of 320466213 is 312664023.

320466213 is a `hidden beast` number, since 32 + 0 + 4 + 6 + 621 + 3 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 172186884 + 148279329 = 13122^2 + 12177^2 .

It is not a de Polignac number, because 320466213 - 2¹⁸ = 320204069 is a prime.

It is a super-2 number, since 2×320466213² = 205397187349122738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320466413) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 2940003 + ... + 2940111.

It is an arithmetic number, because the mean of its divisors is an integer number (11857957).

Almost surely, 2^320466213 is an apocalyptic number.

It is an amenable number.

320466213 is a deficient number, since it is larger than the sum of its proper divisors (177567981).

320466213 is an frugal number, since it uses more digits than its factorization.

320466213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 320466213 is about 17901.5701266677. The cubic root of 320466213 is about 684.3223895756.

The spelling of 320466213 in words is "three hundred twenty million, four hundred sixty-six thousand, two hundred thirteen".