228730215 has 16 divisors (see below), whose sum is σ = 418249728. Its totient is φ = 104562336.

The previous prime is 228730211. The next prime is 228730217. The reversal of 228730215 is 512037822.

228730215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228730215 - 2² = 228730211 is a prime.

It is a super-2 number, since 2×228730215² = 104635022507892450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228730211) 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, 1089087 + ... + 1089296.

It is an arithmetic number, because the mean of its divisors is an integer number (26140608).

Almost surely, 2^228730215 is an apocalyptic number.

228730215 is a deficient number, since it is larger than the sum of its proper divisors (189519513).

228730215 is a wasteful number, since it uses less digits than its factorization.

228730215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178398.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 228730215 is about 15123.8293761864. The cubic root of 228730215 is about 611.5629676018.

The spelling of 228730215 in words is "two hundred twenty-eight million, seven hundred thirty thousand, two hundred fifteen".