225223440437 has 2 divisors, whose sum is σ = 225223440438. Its totient is φ = 225223440436.

The previous prime is 225223440433. The next prime is 225223440439. The reversal of 225223440437 is 734044322522.

225223440437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221138824516 + 4084615921 = 470254^2 + 63911^2 .

It is a cyclic number.

It is not a de Polignac number, because 225223440437 - 2² = 225223440433 is a prime.

Together with 225223440439, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225223440437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225223440433) 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, 112611720218 + 112611720219.

It is an arithmetic number, because the mean of its divisors is an integer number (112611720219).

Almost surely, 2^225223440437 is an apocalyptic number.

It is an amenable number.

225223440437 is a deficient number, since it is larger than the sum of its proper divisors (1).

225223440437 is an equidigital number, since it uses as much as digits as its factorization.

225223440437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 38.

Adding to 225223440437 its reverse (734044322522), we get a palindrome (959267762959).

The spelling of 225223440437 in words is "two hundred twenty-five billion, two hundred twenty-three million, four hundred forty thousand, four hundred thirty-seven".