228220465 has 16 divisors (see below), whose sum is σ = 299557440. Its totient is φ = 165536320.

The previous prime is 228220463. The next prime is 228220511. The reversal of 228220465 is 564022822.

It is not a de Polignac number, because 228220465 - 2¹ = 228220463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228220463) 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, 16062 + ... + 26728.

It is an arithmetic number, because the mean of its divisors is an integer number (18722340).

Almost surely, 2^228220465 is an apocalyptic number.

It is an amenable number.

228220465 is a deficient number, since it is larger than the sum of its proper divisors (71336975).

228220465 is a wasteful number, since it uses less digits than its factorization.

228220465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 228220465 is about 15106.9674322810. The cubic root of 228220465 is about 611.1083183037.

The spelling of 228220465 in words is "two hundred twenty-eight million, two hundred twenty thousand, four hundred sixty-five".