228821265 has 12 divisors (see below), whose sum is σ = 396623604. Its totient is φ = 122037984.

The previous prime is 228821233. The next prime is 228821267. The reversal of 228821265 is 562128822.

It can be written as a sum of positive squares in 2 ways, for example, as 165714129 + 63107136 = 12873^2 + 7944^2 .

It is not a de Polignac number, because 228821265 - 2⁵ = 228821233 is a prime.

It is a super-3 number, since 3×228821265³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (228821267) 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, 2542414 + ... + 2542503.

It is an arithmetic number, because the mean of its divisors is an integer number (33051967).

Almost surely, 2^228821265 is an apocalyptic number.

It is an amenable number.

228821265 is a deficient number, since it is larger than the sum of its proper divisors (167802339).

228821265 is a wasteful number, since it uses less digits than its factorization.

228821265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084928 (or 5084925 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 228821265 is about 15126.8392270163. The cubic root of 228821265 is about 611.6441045595.

The spelling of 228821265 in words is "two hundred twenty-eight million, eight hundred twenty-one thousand, two hundred sixty-five".