225603631709 has 2 divisors, whose sum is σ = 225603631710. Its totient is φ = 225603631708.

The previous prime is 225603631703. The next prime is 225603631787. The reversal of 225603631709 is 907136306522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219208430809 + 6395200900 = 468197^2 + 79970^2 .

It is a cyclic number.

It is not a de Polignac number, because 225603631709 - 2²⁰ = 225602583133 is a prime.

It is a super-2 number, since 2×225603631709² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225603631709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225603631703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112801815854 + 112801815855.

It is an arithmetic number, because the mean of its divisors is an integer number (112801815855).

Almost surely, 2^225603631709 is an apocalyptic number.

It is an amenable number.

225603631709 is a deficient number, since it is larger than the sum of its proper divisors (1).

225603631709 is an equidigital number, since it uses as much as digits as its factorization.

225603631709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 225603631709 in words is "two hundred twenty-five billion, six hundred three million, six hundred thirty-one thousand, seven hundred nine".