228145031 has 2 divisors, whose sum is σ = 228145032. Its totient is φ = 228145030.

The previous prime is 228145013. The next prime is 228145051. The reversal of 228145031 is 130541822.

Together with previous prime (228145013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228145031 - 2⁶ = 228144967 is a prime.

It is a super-2 number, since 2×228145031² = 104100310339981922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228145051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114072515 + 114072516.

It is an arithmetic number, because the mean of its divisors is an integer number (114072516).

Almost surely, 2^228145031 is an apocalyptic number.

228145031 is a deficient number, since it is larger than the sum of its proper divisors (1).

228145031 is an equidigital number, since it uses as much as digits as its factorization.

228145031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 228145031 is about 15104.4705633796. The cubic root of 228145031 is about 611.0409807481.

Adding to 228145031 its reverse (130541822), we get a palindrome (358686853).

The spelling of 228145031 in words is "two hundred twenty-eight million, one hundred forty-five thousand, thirty-one".