228144257 has 8 divisors (see below), whose sum is σ = 255611712. Its totient is φ = 201798000.

The previous prime is 228144173. The next prime is 228144281. The reversal of 228144257 is 752441822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228144257 - 2¹⁸ = 227882113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228144857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279869 + ... + 280682.

It is an arithmetic number, because the mean of its divisors is an integer number (31951464).

Almost surely, 2^228144257 is an apocalyptic number.

It is an amenable number.

228144257 is a deficient number, since it is larger than the sum of its proper divisors (27467455).

228144257 is a wasteful number, since it uses less digits than its factorization.

228144257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560599.

The product of its digits is 35840, while the sum is 35.

The square root of 228144257 is about 15104.4449418044. Note that the first 3 decimals coincide. The cubic root of 228144257 is about 611.0402897457.

The spelling of 228144257 in words is "two hundred twenty-eight million, one hundred forty-four thousand, two hundred fifty-seven".