225746644 has 6 divisors (see below), whose sum is σ = 395056634. Its totient is φ = 112873320.

The previous prime is 225746641. The next prime is 225746659. The reversal of 225746644 is 446647522.

It can be written as a sum of positive squares in only one way, i.e., 219928900 + 5817744 = 14830^2 + 2412^2 .

It is a junction number, because it is equal to n+sod(n) for n = 225746597 and 225746606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225746641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28218327 + ... + 28218334.

Almost surely, 2^225746644 is an apocalyptic number.

It is an amenable number.

225746644 is a deficient number, since it is larger than the sum of its proper divisors (169309990).

225746644 is a wasteful number, since it uses less digits than its factorization.

225746644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56436665 (or 56436663 counting only the distinct ones).

The product of its digits is 322560, while the sum is 40.

The square root of 225746644 is about 15024.8675202146. The cubic root of 225746644 is about 608.8922329831.

The spelling of 225746644 in words is "two hundred twenty-five million, seven hundred forty-six thousand, six hundred forty-four".