228532919 has 2 divisors, whose sum is σ = 228532920. Its totient is φ = 228532918.

The previous prime is 228532903. The next prime is 228532933. The reversal of 228532919 is 919235822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228532919 - 2⁴ = 228532903 is a prime.

It is a super-2 number, since 2×228532919² = 104454590133321122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228534919) 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, 114266459 + 114266460.

It is an arithmetic number, because the mean of its divisors is an integer number (114266460).

Almost surely, 2^228532919 is an apocalyptic number.

228532919 is a deficient number, since it is larger than the sum of its proper divisors (1).

228532919 is an equidigital number, since it uses as much as digits as its factorization.

228532919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 228532919 is about 15117.3052823577. The cubic root of 228532919 is about 611.3870782378.

The spelling of 228532919 in words is "two hundred twenty-eight million, five hundred thirty-two thousand, nine hundred nineteen".