320220433 has 16 divisors (see below), whose sum is σ = 364174720. Its totient is φ = 279127296.

The previous prime is 320220431. The next prime is 320220451. The reversal of 320220433 is 334022023.

It is a cyclic number.

It is not a de Polignac number, because 320220433 - 2¹ = 320220431 is a prime.

It is a super-2 number, since 2×320220433² = 205082251421414978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 320220433.

It is not an unprimeable number, because it can be changed into a prime (320220431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81316 + ... + 85162.

It is an arithmetic number, because the mean of its divisors is an integer number (22760920).

Almost surely, 2^320220433 is an apocalyptic number.

It is an amenable number.

320220433 is a deficient number, since it is larger than the sum of its proper divisors (43954287).

320220433 is a wasteful number, since it uses less digits than its factorization.

320220433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 320220433 is about 17894.7040489638. The cubic root of 320220433 is about 684.1473989248.

Adding to 320220433 its reverse (334022023), we get a palindrome (654242456).

The spelling of 320220433 in words is "three hundred twenty million, two hundred twenty thousand, four hundred thirty-three".