228483509 has 2 divisors, whose sum is σ = 228483510. Its totient is φ = 228483508.

The previous prime is 228483481. The next prime is 228483523. The reversal of 228483509 is 905384822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201214225 + 27269284 = 14185^2 + 5222^2 .

It is a cyclic number.

It is not a de Polignac number, because 228483509 - 2¹² = 228479413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228483589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114241754 + 114241755.

It is an arithmetic number, because the mean of its divisors is an integer number (114241755).

Almost surely, 2^228483509 is an apocalyptic number.

It is an amenable number.

228483509 is a deficient number, since it is larger than the sum of its proper divisors (1).

228483509 is an equidigital number, since it uses as much as digits as its factorization.

228483509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 228483509 is about 15115.6709741910. The cubic root of 228483509 is about 611.3430133783.

The spelling of 228483509 in words is "two hundred twenty-eight million, four hundred eighty-three thousand, five hundred nine".