228137873 has 4 divisors (see below), whose sum is σ = 228175668. Its totient is φ = 228100080.

The previous prime is 228137869. The next prime is 228137887. The reversal of 228137873 is 378731822.

228137873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129572689 + 98565184 = 11383^2 + 9928^2 .

It is a cyclic number.

It is not a de Polignac number, because 228137873 - 2² = 228137869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228137873.

It is not an unprimeable number, because it can be changed into a prime (228137863) 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, 7586 + ... + 22667.

It is an arithmetic number, because the mean of its divisors is an integer number (57043917).

Almost surely, 2^228137873 is an apocalyptic number.

It is an amenable number.

228137873 is a deficient number, since it is larger than the sum of its proper divisors (37795).

228137873 is an equidigital number, since it uses as much as digits as its factorization.

228137873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37794.

The product of its digits is 112896, while the sum is 41.

The square root of 228137873 is about 15104.2336118057. The cubic root of 228137873 is about 611.0345902559.

The spelling of 228137873 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred seventy-three".