225779549 has 2 divisors, whose sum is σ = 225779550. Its totient is φ = 225779548.

The previous prime is 225779539. The next prime is 225779557. The reversal of 225779549 is 945977522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221473924 + 4305625 = 14882^2 + 2075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225779549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225779497 and 225779506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225779509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112889774 + 112889775.

It is an arithmetic number, because the mean of its divisors is an integer number (112889775).

Almost surely, 2^225779549 is an apocalyptic number.

It is an amenable number.

225779549 is a deficient number, since it is larger than the sum of its proper divisors (1).

225779549 is an equidigital number, since it uses as much as digits as its factorization.

225779549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 50.

The square root of 225779549 is about 15025.9624982894. The cubic root of 225779549 is about 608.9218157418.

The spelling of 225779549 in words is "two hundred twenty-five million, seven hundred seventy-nine thousand, five hundred forty-nine".