228217307 has 4 divisors (see below), whose sum is σ = 228427200. Its totient is φ = 228007416.

The previous prime is 228217273. The next prime is 228217309. The reversal of 228217307 is 703712822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703712822 = 2 ⋅351856411.

It is a cyclic number.

It is not a de Polignac number, because 228217307 - 2⁶ = 228217243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228217309) 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, 103307 + ... + 105492.

It is an arithmetic number, because the mean of its divisors is an integer number (57106800).

Almost surely, 2^228217307 is an apocalyptic number.

228217307 is a deficient number, since it is larger than the sum of its proper divisors (209893).

228217307 is a wasteful number, since it uses less digits than its factorization.

228217307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209892.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 228217307 is about 15106.8629106112. The cubic root of 228217307 is about 611.1054995542.

The spelling of 228217307 in words is "two hundred twenty-eight million, two hundred seventeen thousand, three hundred seven".