228217783 has 8 divisors (see below), whose sum is σ = 231634800. Its totient is φ = 224808768.

The previous prime is 228217771. The next prime is 228217789. The reversal of 228217783 is 387712822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228217783 - 2²⁵ = 194663351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228217789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79548 + ... + 82366.

It is an arithmetic number, because the mean of its divisors is an integer number (28954350).

Almost surely, 2^228217783 is an apocalyptic number.

228217783 is a deficient number, since it is larger than the sum of its proper divisors (3417017).

228217783 is a wasteful number, since it uses less digits than its factorization.

228217783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001.

The product of its digits is 75264, while the sum is 40.

The square root of 228217783 is about 15106.8786650320. The cubic root of 228217783 is about 611.1059244212.

The spelling of 228217783 in words is "two hundred twenty-eight million, two hundred seventeen thousand, seven hundred eighty-three".