228135863 has 4 divisors (see below), whose sum is σ = 228680760. Its totient is φ = 227590968.

The previous prime is 228135847. The next prime is 228135881. The reversal of 228135863 is 368531822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368531822 = 2 ⋅184265911.

It is a cyclic number.

It is not a de Polignac number, because 228135863 - 2⁴ = 228135847 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 (228135823) 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, 271820 + ... + 272657.

It is an arithmetic number, because the mean of its divisors is an integer number (57170190).

Almost surely, 2^228135863 is an apocalyptic number.

228135863 is a deficient number, since it is larger than the sum of its proper divisors (544897).

228135863 is an equidigital number, since it uses as much as digits as its factorization.

228135863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544896.

The product of its digits is 69120, while the sum is 38.

The square root of 228135863 is about 15104.1670740230. The cubic root of 228135863 is about 611.0327957517.

The spelling of 228135863 in words is "two hundred twenty-eight million, one hundred thirty-five thousand, eight hundred sixty-three".