228155791 has 8 divisors (see below), whose sum is σ = 238227840. Its totient is φ = 218096472.

The previous prime is 228155771. The next prime is 228155797. The reversal of 228155791 is 197551822.

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 228155791 - 2⁷ = 228155663 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 (228155797) 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, 62700 + ... + 66238.

It is an arithmetic number, because the mean of its divisors is an integer number (29778480).

Almost surely, 2^228155791 is an apocalyptic number.

228155791 is a deficient number, since it is larger than the sum of its proper divisors (10072049).

228155791 is a wasteful number, since it uses less digits than its factorization.

228155791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6365.

The product of its digits is 50400, while the sum is 40.

The square root of 228155791 is about 15104.8267451169. The cubic root of 228155791 is about 611.0505867687.

The spelling of 228155791 in words is "two hundred twenty-eight million, one hundred fifty-five thousand, seven hundred ninety-one".