225605437 has 2 divisors, whose sum is σ = 225605438. Its totient is φ = 225605436.

The previous prime is 225605431. The next prime is 225605447. The reversal of 225605437 is 734506522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182493081 + 43112356 = 13509^2 + 6566^2 .

It is a cyclic number.

It is not a de Polignac number, because 225605437 - 2¹⁹ = 225081149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225605431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112802718 + 112802719.

It is an arithmetic number, because the mean of its divisors is an integer number (112802719).

Almost surely, 2^225605437 is an apocalyptic number.

It is an amenable number.

225605437 is a deficient number, since it is larger than the sum of its proper divisors (1).

225605437 is an equidigital number, since it uses as much as digits as its factorization.

225605437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 225605437 is about 15020.1676754955. The cubic root of 225605437 is about 608.7652502480.

The spelling of 225605437 in words is "two hundred twenty-five million, six hundred five thousand, four hundred thirty-seven".