228280933 has 4 divisors (see below), whose sum is σ = 228312940. Its totient is φ = 228248928.

The previous prime is 228280909. The next prime is 228281041. The reversal of 228280933 is 339082822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 79977249 + 148303684 = 8943^2 + 12178^2 .

It is a cyclic number.

It is not a de Polignac number, because 228280933 - 2¹³ = 228272741 is a prime.

It is a super-2 number, since 2×228280933² = 104224368742700978, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228280892 and 228280901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228280433) 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, 91 + ... + 21367.

It is an arithmetic number, because the mean of its divisors is an integer number (57078235).

Almost surely, 2^228280933 is an apocalyptic number.

It is an amenable number.

228280933 is a deficient number, since it is larger than the sum of its proper divisors (32007).

228280933 is a wasteful number, since it uses less digits than its factorization.

228280933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32006.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 228280933 is about 15108.9686279375. The cubic root of 228280933 is about 611.1622854691.

The spelling of 228280933 in words is "two hundred twenty-eight million, two hundred eighty thousand, nine hundred thirty-three".