228143815 has 4 divisors (see below), whose sum is σ = 273772584. Its totient is φ = 182515048.

The previous prime is 228143809. The next prime is 228143819. The reversal of 228143815 is 518341822.

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 228143815 - 2¹⁵ = 228111047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228143819) 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, 22814377 + ... + 22814386.

It is an arithmetic number, because the mean of its divisors is an integer number (68443146).

Almost surely, 2^228143815 is an apocalyptic number.

228143815 is a deficient number, since it is larger than the sum of its proper divisors (45628769).

228143815 is an equidigital number, since it uses as much as digits as its factorization.

228143815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45628768.

The product of its digits is 15360, while the sum is 34.

The square root of 228143815 is about 15104.4303103427. The cubic root of 228143815 is about 611.0398951416.

The spelling of 228143815 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred fifteen".