225806786321 has 2 divisors, whose sum is σ = 225806786322. Its totient is φ = 225806786320.

The previous prime is 225806786269. The next prime is 225806786327. The reversal of 225806786321 is 123687608522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223881331921 + 1925454400 = 473161^2 + 43880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225806786321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225806786321.

It is not a weakly prime, because it can be changed into another prime (225806786327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112903393160 + 112903393161.

It is an arithmetic number, because the mean of its divisors is an integer number (112903393161).

Almost surely, 2^225806786321 is an apocalyptic number.

It is an amenable number.

225806786321 is a deficient number, since it is larger than the sum of its proper divisors (1).

225806786321 is an equidigital number, since it uses as much as digits as its factorization.

225806786321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 225806786321 in words is "two hundred twenty-five billion, eight hundred six million, seven hundred eighty-six thousand, three hundred twenty-one".