2504633221 has 8 divisors (see below), whose sum is σ = 2546508888. Its totient is φ = 2462784000.

The previous prime is 2504633203. The next prime is 2504633269. The reversal of 2504633221 is 1223364052.

It can be written as a sum of positive squares in 4 ways, for example, as 92448225 + 2412184996 = 9615^2 + 49114^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2504633221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2504633221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2504633281) 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, 305901 + ... + 313981.

It is an arithmetic number, because the mean of its divisors is an integer number (318313611).

Almost surely, 2^2504633221 is an apocalyptic number.

It is an amenable number.

2504633221 is a deficient number, since it is larger than the sum of its proper divisors (41875667).

2504633221 is an equidigital number, since it uses as much as digits as its factorization.

2504633221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13223.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 2504633221 is about 50046.3107631322. The cubic root of 2504633221 is about 1358.0467239909.

Adding to 2504633221 its reverse (1223364052), we get a palindrome (3727997273).

The spelling of 2504633221 in words is "two billion, five hundred four million, six hundred thirty-three thousand, two hundred twenty-one".