228228215 has 4 divisors (see below), whose sum is σ = 273873864. Its totient is φ = 182582568.

The previous prime is 228228191. The next prime is 228228223. The reversal of 228228215 is 512822822.

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 228228215 - 2⁸ = 228227959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22822817 + ... + 22822826.

It is an arithmetic number, because the mean of its divisors is an integer number (68468466).

Almost surely, 2^228228215 is an apocalyptic number.

228228215 is a deficient number, since it is larger than the sum of its proper divisors (45645649).

228228215 is an equidigital number, since it uses as much as digits as its factorization.

228228215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45645648.

The product of its digits is 10240, while the sum is 32.

The square root of 228228215 is about 15107.2239342640. The cubic root of 228228215 is about 611.1152356440.

The spelling of 228228215 in words is "two hundred twenty-eight million, two hundred twenty-eight thousand, two hundred fifteen".