320203213 has 12 divisors (see below), whose sum is σ = 355178304. Its totient is φ = 286285200.

The previous prime is 320203199. The next prime is 320203243. The reversal of 320203213 is 312302023.

It is a de Polignac number, because none of the positive numbers 2^k-320203213 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 (320203243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37020 + ... + 44842.

It is an arithmetic number, because the mean of its divisors is an integer number (29598192).

Almost surely, 2^320203213 is an apocalyptic number.

It is an amenable number.

320203213 is a deficient number, since it is larger than the sum of its proper divisors (34975091).

320203213 is an equidigital number, since it uses as much as digits as its factorization.

320203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956 (or 7895 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 320203213 is about 17894.2228945545. Note that the first 3 decimals coincide. The cubic root of 320203213 is about 684.1351352588.

Adding to 320203213 its reverse (312302023), we get a palindrome (632505236).

The spelling of 320203213 in words is "three hundred twenty million, two hundred three thousand, two hundred thirteen".