228216715 has 4 divisors (see below), whose sum is σ = 273860064. Its totient is φ = 182573368.

The previous prime is 228216713. The next prime is 228216757. The reversal of 228216715 is 517612822.

It is a happy number.

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 228216715 - 2¹ = 228216713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228216713) 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, 22821667 + ... + 22821676.

It is an arithmetic number, because the mean of its divisors is an integer number (68465016).

Almost surely, 2^228216715 is an apocalyptic number.

228216715 is a deficient number, since it is larger than the sum of its proper divisors (45643349).

228216715 is an equidigital number, since it uses as much as digits as its factorization.

228216715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45643348.

The product of its digits is 13440, while the sum is 34.

The square root of 228216715 is about 15106.8433168548. The cubic root of 228216715 is about 611.1049711474.

The spelling of 228216715 in words is "two hundred twenty-eight million, two hundred sixteen thousand, seven hundred fifteen".