228147047 has 4 divisors (see below), whose sum is σ = 228547176. Its totient is φ = 227746920.

The previous prime is 228147019. The next prime is 228147067. The reversal of 228147047 is 740741822.

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 228147047 - 2²⁰ = 227098471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228146998 and 228147016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228147067) 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, 199208 + ... + 200349.

It is an arithmetic number, because the mean of its divisors is an integer number (57136794).

Almost surely, 2^228147047 is an apocalyptic number.

228147047 is a deficient number, since it is larger than the sum of its proper divisors (400129).

228147047 is an equidigital number, since it uses as much as digits as its factorization.

228147047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400128.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 228147047 is about 15104.5372984412. The cubic root of 228147047 is about 611.0427805608.

Adding to 228147047 its reverse (740741822), we get a palindrome (968888869).

The spelling of 228147047 in words is "two hundred twenty-eight million, one hundred forty-seven thousand, forty-seven".