224640561 has 8 divisors (see below), whose sum is σ = 299846880. Its totient is φ = 149597312.

The previous prime is 224640523. The next prime is 224640571. The reversal of 224640561 is 165046422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 224640561 - 2⁷ = 224640433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (224640511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37515 + ... + 43088.

It is an arithmetic number, because the mean of its divisors is an integer number (37480860).

Almost surely, 2^224640561 is an apocalyptic number.

It is an amenable number.

224640561 is a deficient number, since it is larger than the sum of its proper divisors (75206319).

224640561 is an equidigital number, since it uses as much as digits as its factorization.

224640561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81535.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 224640561 is about 14988.0139111224. The cubic root of 224640561 is about 607.8961483302.

Adding to 224640561 its reverse (165046422), we get a palindrome (389686983).

The spelling of 224640561 in words is "two hundred twenty-four million, six hundred forty thousand, five hundred sixty-one".