225666421317451 has 2 divisors, whose sum is σ = 225666421317452. Its totient is φ = 225666421317450.

The previous prime is 225666421317413. The next prime is 225666421317499. The reversal of 225666421317451 is 154713124666522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225666421317451 - 2¹⁵ = 225666421284683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225666421317392 and 225666421317401.

It is not a weakly prime, because it can be changed into another prime (225666421315451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112833210658725 + 112833210658726.

It is an arithmetic number, because the mean of its divisors is an integer number (112833210658726).

Almost surely, 2^{225666421317451} is an apocalyptic number.

225666421317451 is a deficient number, since it is larger than the sum of its proper divisors (1).

225666421317451 is an equidigital number, since it uses as much as digits as its factorization.

225666421317451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 55.

The spelling of 225666421317451 in words is "two hundred twenty-five trillion, six hundred sixty-six billion, four hundred twenty-one million, three hundred seventeen thousand, four hundred fifty-one".