228145009 has 8 divisors (see below), whose sum is σ = 230252960. Its totient is φ = 226044000.

The previous prime is 228144977. The next prime is 228145013. The reversal of 228145009 is 900541822.

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 228145009 - 2⁵ = 228144977 is a prime.

It is a super-2 number, since 2×228145009² = 104100290263220162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228145409) 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, 82174 + ... + 84904.

It is an arithmetic number, because the mean of its divisors is an integer number (28781620).

Almost surely, 2^228145009 is an apocalyptic number.

It is an amenable number.

228145009 is a deficient number, since it is larger than the sum of its proper divisors (2107951).

228145009 is a wasteful number, since it uses less digits than its factorization.

228145009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 228145009 is about 15104.4698351183. The cubic root of 228145009 is about 611.0409611072.

The spelling of 228145009 in words is "two hundred twenty-eight million, one hundred forty-five thousand, nine".