225815287693 has 2 divisors, whose sum is σ = 225815287694. Its totient is φ = 225815287692.

The previous prime is 225815287661. The next prime is 225815287739. The reversal of 225815287693 is 396782518522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223329966084 + 2485321609 = 472578^2 + 49853^2 .

It is a cyclic number.

It is not a de Polignac number, because 225815287693 - 2⁵ = 225815287661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225815287613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112907643846 + 112907643847.

It is an arithmetic number, because the mean of its divisors is an integer number (112907643847).

Almost surely, 2^225815287693 is an apocalyptic number.

It is an amenable number.

225815287693 is a deficient number, since it is larger than the sum of its proper divisors (1).

225815287693 is an equidigital number, since it uses as much as digits as its factorization.

225815287693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 58.

The spelling of 225815287693 in words is "two hundred twenty-five billion, eight hundred fifteen million, two hundred eighty-seven thousand, six hundred ninety-three".