228144237 has 4 divisors (see below), whose sum is σ = 304192320. Its totient is φ = 152096156.

The previous prime is 228144173. The next prime is 228144281. The reversal of 228144237 is 732441822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228144237 - 2⁶ = 228144173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228144198 and 228144207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228148237) 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, 38024037 + ... + 38024042.

It is an arithmetic number, because the mean of its divisors is an integer number (76048080).

Almost surely, 2^228144237 is an apocalyptic number.

It is an amenable number.

228144237 is a deficient number, since it is larger than the sum of its proper divisors (76048083).

228144237 is an equidigital number, since it uses as much as digits as its factorization.

228144237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76048082.

The product of its digits is 21504, while the sum is 33.

The square root of 228144237 is about 15104.4442797476. Note that the first 3 decimals coincide. The cubic root of 228144237 is about 611.0402718903.

The spelling of 228144237 in words is "two hundred twenty-eight million, one hundred forty-four thousand, two hundred thirty-seven".