225730649 has 2 divisors, whose sum is σ = 225730650. Its totient is φ = 225730648.

The previous prime is 225730639. The next prime is 225730651. The reversal of 225730649 is 946037522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117570649 + 108160000 = 10843^2 + 10400^2 .

It is a cyclic number.

It is not a de Polignac number, because 225730649 - 2¹⁶ = 225665113 is a prime.

It is a super-2 number, since 2×225730649² = 101908651795922402, which contains 22 as substring.

Together with 225730651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225730639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112865324 + 112865325.

It is an arithmetic number, because the mean of its divisors is an integer number (112865325).

Almost surely, 2^225730649 is an apocalyptic number.

It is an amenable number.

225730649 is a deficient number, since it is larger than the sum of its proper divisors (1).

225730649 is an equidigital number, since it uses as much as digits as its factorization.

225730649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 225730649 is about 15024.3352265583. The cubic root of 225730649 is about 608.8778518740.

The spelling of 225730649 in words is "two hundred twenty-five million, seven hundred thirty thousand, six hundred forty-nine".