228685519 has 2 divisors, whose sum is σ = 228685520. Its totient is φ = 228685518.

The previous prime is 228685511. The next prime is 228685553. The reversal of 228685519 is 915586822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228685519 - 2³ = 228685511 is a prime.

It is a super-2 number, since 2×228685519² = 104594133200598722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228685511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114342759 + 114342760.

It is an arithmetic number, because the mean of its divisors is an integer number (114342760).

Almost surely, 2^228685519 is an apocalyptic number.

228685519 is a deficient number, since it is larger than the sum of its proper divisors (1).

228685519 is an equidigital number, since it uses as much as digits as its factorization.

228685519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The square root of 228685519 is about 15122.3516359064. The cubic root of 228685519 is about 611.5231299864.

The spelling of 228685519 in words is "two hundred twenty-eight million, six hundred eighty-five thousand, five hundred nineteen".