228205815 has 16 divisors (see below), whose sum is σ = 365842656. Its totient is φ = 121472000.

The previous prime is 228205781. The next prime is 228205871. The reversal of 228205815 is 518502822.

It is not a de Polignac number, because 228205815 - 2¹⁴ = 228189431 is a prime.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6786 + ... + 22415.

It is an arithmetic number, because the mean of its divisors is an integer number (22865166).

Almost surely, 2^228205815 is an apocalyptic number.

228205815 is a deficient number, since it is larger than the sum of its proper divisors (137636841).

228205815 is a wasteful number, since it uses less digits than its factorization.

228205815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29730.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 228205815 is about 15106.4825488927. The cubic root of 228205815 is about 611.0952418714.

The spelling of 228205815 in words is "two hundred twenty-eight million, two hundred five thousand, eight hundred fifteen".