228015919 has 2 divisors, whose sum is σ = 228015920. Its totient is φ = 228015918.

The previous prime is 228015871. The next prime is 228015923. The reversal of 228015919 is 919510822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228015919 - 2¹¹ = 228013871 is a prime.

It is a super-2 number, since 2×228015919² = 103982518634829122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228015929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114007959 + 114007960.

It is an arithmetic number, because the mean of its divisors is an integer number (114007960).

Almost surely, 2^228015919 is an apocalyptic number.

228015919 is a deficient number, since it is larger than the sum of its proper divisors (1).

228015919 is an equidigital number, since it uses as much as digits as its factorization.

228015919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 228015919 is about 15100.1959921055. The cubic root of 228015919 is about 610.9256920802.

The spelling of 228015919 in words is "two hundred twenty-eight million, fifteen thousand, nine hundred nineteen".