228217851 has 32 divisors (see below), whose sum is σ = 344298240. Its totient is φ = 149385600.

The previous prime is 228217837. The next prime is 228217889. The reversal of 228217851 is 158712822.

It is not a de Polignac number, because 228217851 - 2⁵ = 228217819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228212851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 399396 + ... + 399966.

It is an arithmetic number, because the mean of its divisors is an integer number (10759320).

Almost surely, 2^228217851 is an apocalyptic number.

228217851 is a deficient number, since it is larger than the sum of its proper divisors (116080389).

228217851 is a wasteful number, since it uses less digits than its factorization.

228217851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 818 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 228217851 is about 15106.8809156622. The cubic root of 228217851 is about 611.1059851165.

The spelling of 228217851 in words is "two hundred twenty-eight million, two hundred seventeen thousand, eight hundred fifty-one".