225240031 has 2 divisors, whose sum is σ = 225240032. Its totient is φ = 225240030.

The previous prime is 225240023. The next prime is 225240047. The reversal of 225240031 is 130042522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225240031 - 2³ = 225240023 is a prime.

It is a super-2 number, since 2×225240031² = 101466143129761922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 225239990 and 225240008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225240061) 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, 112620015 + 112620016.

It is an arithmetic number, because the mean of its divisors is an integer number (112620016).

Almost surely, 2^225240031 is an apocalyptic number.

225240031 is a deficient number, since it is larger than the sum of its proper divisors (1).

225240031 is an equidigital number, since it uses as much as digits as its factorization.

225240031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 225240031 is about 15007.9989005863. The cubic root of 225240031 is about 608.4364066960.

Adding to 225240031 its reverse (130042522), we get a palindrome (355282553).

The spelling of 225240031 in words is "two hundred twenty-five million, two hundred forty thousand, thirty-one".