225240437 has 2 divisors, whose sum is σ = 225240438. Its totient is φ = 225240436.

The previous prime is 225240391. The next prime is 225240439. The reversal of 225240437 is 734042522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220195921 + 5044516 = 14839^2 + 2246^2 .

It is a cyclic number.

It is not a de Polignac number, because 225240437 - 2¹⁸ = 224978293 is a prime.

Together with 225240439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225240439) 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, 112620218 + 112620219.

It is an arithmetic number, because the mean of its divisors is an integer number (112620219).

Almost surely, 2^225240437 is an apocalyptic number.

It is an amenable number.

225240437 is a deficient number, since it is larger than the sum of its proper divisors (1).

225240437 is an equidigital number, since it uses as much as digits as its factorization.

225240437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 225240437 is about 15008.0124267006. The cubic root of 225240437 is about 608.4367722690.

Adding to 225240437 its reverse (734042522), we get a palindrome (959282959).

The spelling of 225240437 in words is "two hundred twenty-five million, two hundred forty thousand, four hundred thirty-seven".