228312099 has 48 divisors (see below), whose sum is σ = 361558080. Its totient is φ = 138378240.

The previous prime is 228312061. The next prime is 228312107. The reversal of 228312099 is 990213822.

228312099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 15110²-1.

It is not a de Polignac number, because 228312099 - 2⁷ = 228311971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228332099) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 437959 + ... + 438479.

It is an arithmetic number, because the mean of its divisors is an integer number (7532460).

Almost surely, 2^228312099 is an apocalyptic number.

228312099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

228312099 is a deficient number, since it is larger than the sum of its proper divisors (133245981).

228312099 is a wasteful number, since it uses less digits than its factorization.

228312099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 228312099 is about 15109.9999669093. Note that the first 4 decimals coincide. The cubic root of 228312099 is about 611.1900971319.

The spelling of 228312099 in words is "two hundred twenty-eight million, three hundred twelve thousand, ninety-nine".