228109551 has 8 divisors (see below), whose sum is σ = 312366384. Its totient is φ = 147962880.

The previous prime is 228109549. The next prime is 228109559. The reversal of 228109551 is 155901822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228109551 - 2¹ = 228109549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228109559) 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 7 ways as a sum of consecutive naturals, for example, 1027410 + ... + 1027631.

It is an arithmetic number, because the mean of its divisors is an integer number (39045798).

Almost surely, 2^228109551 is an apocalyptic number.

228109551 is a deficient number, since it is larger than the sum of its proper divisors (84256833).

228109551 is a wasteful number, since it uses less digits than its factorization.

228109551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055081.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 228109551 is about 15103.2960309993. The cubic root of 228109551 is about 611.0093037371.

The spelling of 228109551 in words is "two hundred twenty-eight million, one hundred nine thousand, five hundred fifty-one".