228172815 has 96 divisors (see below), whose sum is σ = 448511040. Its totient is φ = 109983744.

The previous prime is 228172801. The next prime is 228172817. The reversal of 228172815 is 518271822.

228172815 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 228172815 - 2⁴ = 228172799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228172815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228172817) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1665427 + ... + 1665563.

It is an arithmetic number, because the mean of its divisors is an integer number (4671990).

Almost surely, 2^228172815 is an apocalyptic number.

228172815 is a deficient number, since it is larger than the sum of its proper divisors (220338225).

228172815 is a wasteful number, since it uses less digits than its factorization.

228172815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 231 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 228172815 is about 15105.3902630816. The cubic root of 228172815 is about 611.0657843761.

The spelling of 228172815 in words is "two hundred twenty-eight million, one hundred seventy-two thousand, eight hundred fifteen".