228161215 has 16 divisors (see below), whose sum is σ = 290488320. Its totient is φ = 171551520.

The previous prime is 228161191. The next prime is 228161221. The reversal of 228161215 is 512161822.

It is not a de Polignac number, because 228161215 - 2¹⁵ = 228128447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2610 + ... + 21520.

It is an arithmetic number, because the mean of its divisors is an integer number (18155520).

Almost surely, 2^228161215 is an apocalyptic number.

228161215 is a deficient number, since it is larger than the sum of its proper divisors (62327105).

228161215 is a wasteful number, since it uses less digits than its factorization.

228161215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19062.

The product of its digits is 1920, while the sum is 28.

The square root of 228161215 is about 15105.0062893069. The cubic root of 228161215 is about 611.0554289456.

The spelling of 228161215 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, two hundred fifteen".