228991599 has 12 divisors (see below), whose sum is σ = 331435000. Its totient is φ = 152352144.

The previous prime is 228991597. The next prime is 228991613. The reversal of 228991599 is 995199822.

It is not a de Polignac number, because 228991599 - 2¹ = 228991597 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 (228991597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21004 + ... + 29985.

Almost surely, 2^228991599 is an apocalyptic number.

228991599 is a deficient number, since it is larger than the sum of its proper divisors (102443401).

228991599 is a wasteful number, since it uses less digits than its factorization.

228991599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51494 (or 51491 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 228991599 is about 15132.4683710226. The cubic root of 228991599 is about 611.7958357171.

The spelling of 228991599 in words is "two hundred twenty-eight million, nine hundred ninety-one thousand, five hundred ninety-nine".