228902191 has 16 divisors (see below), whose sum is σ = 271203840. Its totient is φ = 189030240.

The previous prime is 228902183. The next prime is 228902207. The reversal of 228902191 is 191209822.

It is not a de Polignac number, because 228902191 - 2³ = 228902183 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 (228902491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127200 + ... + 128986.

It is an arithmetic number, because the mean of its divisors is an integer number (16950240).

Almost surely, 2^228902191 is an apocalyptic number.

228902191 is a deficient number, since it is larger than the sum of its proper divisors (42301649).

228902191 is a wasteful number, since it uses less digits than its factorization.

228902191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 228902191 is about 15129.5139049475. The cubic root of 228902191 is about 611.7162017001.

The spelling of 228902191 in words is "two hundred twenty-eight million, nine hundred two thousand, one hundred ninety-one".