225744647 has 4 divisors (see below), whose sum is σ = 231250656. Its totient is φ = 220238640.

The previous prime is 225744599. The next prime is 225744691. The reversal of 225744647 is 746447522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225744647 - 2⁸ = 225744391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 5505967 = 225744647 / (2 + 2 + 5 + 7 + 4 + 4 + 6 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225744247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2752943 + ... + 2753024.

It is an arithmetic number, because the mean of its divisors is an integer number (57812664).

Almost surely, 2^225744647 is an apocalyptic number.

225744647 is a deficient number, since it is larger than the sum of its proper divisors (5506009).

225744647 is an equidigital number, since it uses as much as digits as its factorization.

225744647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506008.

The product of its digits is 376320, while the sum is 41.

The square root of 225744647 is about 15024.8010635749. The cubic root of 225744647 is about 608.8904375169.

The spelling of 225744647 in words is "two hundred twenty-five million, seven hundred forty-four thousand, six hundred forty-seven".