228731099 has 4 divisors (see below), whose sum is σ = 232145064. Its totient is φ = 225317136.

The previous prime is 228731059. The next prime is 228731131. The reversal of 228731099 is 990137822.

It is a happy number.

228731099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228731099 - 2²⁴ = 211953883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228731059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706882 + ... + 1707015.

It is an arithmetic number, because the mean of its divisors is an integer number (58036266).

Almost surely, 2^228731099 is an apocalyptic number.

228731099 is a deficient number, since it is larger than the sum of its proper divisors (3413965).

228731099 is an equidigital number, since it uses as much as digits as its factorization.

228731099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413964.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 228731099 is about 15123.8586015606. The cubic root of 228731099 is about 611.5637554601.

The spelling of 228731099 in words is "two hundred twenty-eight million, seven hundred thirty-one thousand, ninety-nine".