228217893 has 4 divisors (see below), whose sum is σ = 304290528. Its totient is φ = 152145260.

The previous prime is 228217889. The next prime is 228217901. The reversal of 228217893 is 398712822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228217893 - 2² = 228217889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228217393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38036313 + ... + 38036318.

It is an arithmetic number, because the mean of its divisors is an integer number (76072632).

Almost surely, 2^228217893 is an apocalyptic number.

It is an amenable number.

228217893 is a deficient number, since it is larger than the sum of its proper divisors (76072635).

228217893 is an equidigital number, since it uses as much as digits as its factorization.

228217893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76072634.

The product of its digits is 96768, while the sum is 42.

The square root of 228217893 is about 15106.8823057572. The cubic root of 228217893 is about 611.1060226047.

The spelling of 228217893 in words is "two hundred twenty-eight million, two hundred seventeen thousand, eight hundred ninety-three".