228143267 has 4 divisors (see below), whose sum is σ = 248883576. Its totient is φ = 207402960.

The previous prime is 228143263. The next prime is 228143297. The reversal of 228143267 is 762341822.

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 228143267 - 2² = 228143263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228143263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10370138 + ... + 10370159.

It is an arithmetic number, because the mean of its divisors is an integer number (62220894).

Almost surely, 2^228143267 is an apocalyptic number.

228143267 is a deficient number, since it is larger than the sum of its proper divisors (20740309).

228143267 is a wasteful number, since it uses less digits than its factorization.

228143267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20740308.

The product of its digits is 32256, while the sum is 35.

The square root of 228143267 is about 15104.4121699588. The cubic root of 228143267 is about 611.0394059032.

The spelling of 228143267 in words is "two hundred twenty-eight million, one hundred forty-three thousand, two hundred sixty-seven".