228145117 has 16 divisors (see below), whose sum is σ = 253661760. Its totient is φ = 204196608.

The previous prime is 228145111. The next prime is 228145121. The reversal of 228145117 is 711541822.

It is a cyclic number.

It is not a de Polignac number, because 228145117 - 2²⁷ = 93927389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228145111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29578 + ... + 36484.

It is an arithmetic number, because the mean of its divisors is an integer number (15853860).

Almost surely, 2^228145117 is an apocalyptic number.

It is an amenable number.

228145117 is a deficient number, since it is larger than the sum of its proper divisors (25516643).

228145117 is a wasteful number, since it uses less digits than its factorization.

228145117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020.

The product of its digits is 4480, while the sum is 31.

The square root of 228145117 is about 15104.4734102186. The cubic root of 228145117 is about 611.0410575260.

Adding to 228145117 its reverse (711541822), we get a palindrome (939686939).

The spelling of 228145117 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred seventeen".