225661213513 has 2 divisors, whose sum is σ = 225661213514. Its totient is φ = 225661213512.

The previous prime is 225661213489. The next prime is 225661213579. The reversal of 225661213513 is 315312166522.

225661213513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217877033529 + 7784179984 = 466773^2 + 88228^2 .

It is a cyclic number.

It is not a de Polignac number, because 225661213513 - 2²⁹ = 225124342601 is a prime.

It is not a weakly prime, because it can be changed into another prime (225661213913) 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, 112830606756 + 112830606757.

It is an arithmetic number, because the mean of its divisors is an integer number (112830606757).

Almost surely, 2^225661213513 is an apocalyptic number.

It is an amenable number.

225661213513 is a deficient number, since it is larger than the sum of its proper divisors (1).

225661213513 is an equidigital number, since it uses as much as digits as its factorization.

225661213513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The spelling of 225661213513 in words is "two hundred twenty-five billion, six hundred sixty-one million, two hundred thirteen thousand, five hundred thirteen".