320228251 has 4 divisors (see below), whose sum is σ = 365975152. Its totient is φ = 274481352.

The previous prime is 320228243. The next prime is 320228257. The reversal of 320228251 is 152822023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320228251 - 2³ = 320228243 is a prime.

It is a super-2 number, since 2×320228251² = 205092265477038002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320228257) 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, 22873440 + ... + 22873453.

It is an arithmetic number, because the mean of its divisors is an integer number (91493788).

Almost surely, 2^320228251 is an apocalyptic number.

320228251 is a deficient number, since it is larger than the sum of its proper divisors (45746901).

320228251 is an equidigital number, since it uses as much as digits as its factorization.

320228251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45746900.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 320228251 is about 17894.9224921484. The cubic root of 320228251 is about 684.1529665696.

The spelling of 320228251 in words is "three hundred twenty million, two hundred twenty-eight thousand, two hundred fifty-one".