228184309 has 2 divisors, whose sum is σ = 228184310. Its totient is φ = 228184308.

The previous prime is 228184303. The next prime is 228184321. The reversal of 228184309 is 903481822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174821284 + 53363025 = 13222^2 + 7305^2 .

It is a cyclic number.

It is not a de Polignac number, because 228184309 - 2³ = 228184301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228184301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114092154 + 114092155.

It is an arithmetic number, because the mean of its divisors is an integer number (114092155).

Almost surely, 2^228184309 is an apocalyptic number.

It is an amenable number.

228184309 is a deficient number, since it is larger than the sum of its proper divisors (1).

228184309 is an equidigital number, since it uses as much as digits as its factorization.

228184309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 228184309 is about 15105.7707185036. The cubic root of 228184309 is about 611.0760448333.

The spelling of 228184309 in words is "two hundred twenty-eight million, one hundred eighty-four thousand, three hundred nine".