225697249 has 2 divisors, whose sum is σ = 225697250. Its totient is φ = 225697248.

The previous prime is 225697237. The next prime is 225697259. The reversal of 225697249 is 942796522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218832849 + 6864400 = 14793^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 225697249 - 2¹⁷ = 225566177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225697199 and 225697208.

It is not a weakly prime, because it can be changed into another prime (225697259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112848624 + 112848625.

It is an arithmetic number, because the mean of its divisors is an integer number (112848625).

Almost surely, 2^225697249 is an apocalyptic number.

It is an amenable number.

225697249 is a deficient number, since it is larger than the sum of its proper divisors (1).

225697249 is an equidigital number, since it uses as much as digits as its factorization.

225697249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 225697249 is about 15023.2236553943. The cubic root of 225697249 is about 608.8478197340.

The spelling of 225697249 in words is "two hundred twenty-five million, six hundred ninety-seven thousand, two hundred forty-nine".