228216263 has 4 divisors (see below), whose sum is σ = 248963208. Its totient is φ = 207469320.

The previous prime is 228216253. The next prime is 228216293. The reversal of 228216263 is 362612822.

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 228216263 - 2¹⁸ = 227954119 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 (228216253) 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, 10373456 + ... + 10373477.

It is an arithmetic number, because the mean of its divisors is an integer number (62240802).

Almost surely, 2^228216263 is an apocalyptic number.

228216263 is a deficient number, since it is larger than the sum of its proper divisors (20746945).

228216263 is a wasteful number, since it uses less digits than its factorization.

228216263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20746944.

The product of its digits is 13824, while the sum is 32.

The square root of 228216263 is about 15106.8283567399. The cubic root of 228216263 is about 611.1045677010.

The spelling of 228216263 in words is "two hundred twenty-eight million, two hundred sixteen thousand, two hundred sixty-three".