228025439 has 2 divisors, whose sum is σ = 228025440. Its totient is φ = 228025438.

The previous prime is 228025411. The next prime is 228025459. The reversal of 228025439 is 934520822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228025439 is a prime.

It is a super-2 number, since 2×228025439² = 103991201662285442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 228025399 and 228025408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228025409) 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, 114012719 + 114012720.

It is an arithmetic number, because the mean of its divisors is an integer number (114012720).

Almost surely, 2^228025439 is an apocalyptic number.

228025439 is a deficient number, since it is larger than the sum of its proper divisors (1).

228025439 is an equidigital number, since it uses as much as digits as its factorization.

228025439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 228025439 is about 15100.5112165118. The cubic root of 228025439 is about 610.9341943106.

The spelling of 228025439 in words is "two hundred twenty-eight million, twenty-five thousand, four hundred thirty-nine".