224908661 has 4 divisors (see below), whose sum is σ = 225201900. Its totient is φ = 224615424.

The previous prime is 224908639. The next prime is 224908687. The reversal of 224908661 is 166809422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 163584100 + 61324561 = 12790^2 + 7831^2 .

It is a cyclic number.

It is not a de Polignac number, because 224908661 - 2⁶ = 224908597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224908631) 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, 145466 + ... + 147003.

It is an arithmetic number, because the mean of its divisors is an integer number (56300475).

Almost surely, 2^224908661 is an apocalyptic number.

It is an amenable number.

224908661 is a deficient number, since it is larger than the sum of its proper divisors (293239).

224908661 is an equidigital number, since it uses as much as digits as its factorization.

224908661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293238.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 224908661 is about 14996.9550576109. The cubic root of 224908661 is about 608.1378858626.

The spelling of 224908661 in words is "two hundred twenty-four million, nine hundred eight thousand, six hundred sixty-one".