225000031 has 2 divisors, whose sum is σ = 225000032. Its totient is φ = 225000030.

The previous prime is 225000029. The next prime is 225000043. The reversal of 225000031 is 130000522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225000031 - 2¹ = 225000029 is a prime.

It is a super-2 number, since 2×225000031² = 101250027900001922, which contains 22 as substring.

Together with 225000029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 224999975 and 225000020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225000011) 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, 112500015 + 112500016.

It is an arithmetic number, because the mean of its divisors is an integer number (112500016).

Almost surely, 2^225000031 is an apocalyptic number.

225000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

225000031 is an equidigital number, since it uses as much as digits as its factorization.

225000031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 225000031 is about 15000.0010333333. The cubic root of 225000031 is about 608.2202274904.

Adding to 225000031 its reverse (130000522), we get a palindrome (355000553).

The spelling of 225000031 in words is "two hundred twenty-five million, thirty-one", and thus it is an aban number.