225945749 has 2 divisors, whose sum is σ = 225945750. Its totient is φ = 225945748.

The previous prime is 225945719. The next prime is 225945761. The reversal of 225945749 is 947549522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135885649 + 90060100 = 11657^2 + 9490^2 .

It is a cyclic number.

It is not a de Polignac number, because 225945749 - 2⁸ = 225945493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225945719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112972874 + 112972875.

It is an arithmetic number, because the mean of its divisors is an integer number (112972875).

Almost surely, 2^225945749 is an apocalyptic number.

It is an amenable number.

225945749 is a deficient number, since it is larger than the sum of its proper divisors (1).

225945749 is an equidigital number, since it uses as much as digits as its factorization.

225945749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 225945749 is about 15031.4919086563. The cubic root of 225945749 is about 609.0711915142.

The spelling of 225945749 in words is "two hundred twenty-five million, nine hundred forty-five thousand, seven hundred forty-nine".