228320481 has 8 divisors (see below), whose sum is σ = 305551744. Its totient is φ = 151651440.

The previous prime is 228320479. The next prime is 228320531. The reversal of 228320481 is 184023822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228320481 - 2¹ = 228320479 is a prime.

It is a super-2 number, since 2×228320481² = 104260484088142722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228320881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139606 + ... + 141231.

It is an arithmetic number, because the mean of its divisors is an integer number (38193968).

Almost surely, 2^228320481 is an apocalyptic number.

It is an amenable number.

228320481 is a deficient number, since it is larger than the sum of its proper divisors (77231263).

228320481 is a wasteful number, since it uses less digits than its factorization.

228320481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281111.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 228320481 is about 15110.2773303471. The cubic root of 228320481 is about 611.1975765614.

The spelling of 228320481 in words is "two hundred twenty-eight million, three hundred twenty thousand, four hundred eighty-one".