228751191 has 6 divisors (see below), whose sum is σ = 330418400. Its totient is φ = 152500788.

The previous prime is 228751183. The next prime is 228751213. The reversal of 228751191 is 191157822.

It is a happy number.

It is not a de Polignac number, because 228751191 - 2³ = 228751183 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 (228751181) 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 5 ways as a sum of consecutive naturals, for example, 12708391 + ... + 12708408.

Almost surely, 2^228751191 is an apocalyptic number.

228751191 is a deficient number, since it is larger than the sum of its proper divisors (101667209).

228751191 is a wasteful number, since it uses less digits than its factorization.

228751191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25416805 (or 25416802 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 228751191 is about 15124.5228354484. The cubic root of 228751191 is about 611.5816617545.

The spelling of 228751191 in words is "two hundred twenty-eight million, seven hundred fifty-one thousand, one hundred ninety-one".