228195191 has 8 divisors (see below), whose sum is σ = 260900640. Its totient is φ = 195516288.

The previous prime is 228195173. The next prime is 228195211. The reversal of 228195191 is 191591822.

It is a happy number.

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 228195191 - 2¹⁸ = 227933047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228194191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17795 + ... + 27803.

It is an arithmetic number, because the mean of its divisors is an integer number (32612580).

Almost surely, 2^228195191 is an apocalyptic number.

228195191 is a deficient number, since it is larger than the sum of its proper divisors (32705449).

228195191 is a wasteful number, since it uses less digits than its factorization.

228195191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13273.

The product of its digits is 12960, while the sum is 38.

The square root of 228195191 is about 15106.1309076812. The cubic root of 228195191 is about 611.0857586532.

The spelling of 228195191 in words is "two hundred twenty-eight million, one hundred ninety-five thousand, one hundred ninety-one".