228256313 has 4 divisors (see below), whose sum is σ = 228751908. Its totient is φ = 227760720.

The previous prime is 228256283. The next prime is 228256321. The reversal of 228256313 is 313652822.

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 142730809 + 85525504 = 11947^2 + 9248^2 .

It is a cyclic number.

It is not a de Polignac number, because 228256313 - 2²⁴ = 211479097 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 228256313.

It is not an unprimeable number, because it can be changed into a prime (228256363) 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, 247106 + ... + 248027.

It is an arithmetic number, because the mean of its divisors is an integer number (57187977).

Almost surely, 2^228256313 is an apocalyptic number.

It is an amenable number.

228256313 is a deficient number, since it is larger than the sum of its proper divisors (495595).

228256313 is an equidigital number, since it uses as much as digits as its factorization.

228256313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495594.

The product of its digits is 17280, while the sum is 32.

The square root of 228256313 is about 15108.1538580993. The cubic root of 228256313 is about 611.1403134830.

The spelling of 228256313 in words is "two hundred twenty-eight million, two hundred fifty-six thousand, three hundred thirteen".