2504530621 has 2 divisors, whose sum is σ = 2504530622. Its totient is φ = 2504530620.

The previous prime is 2504530603. The next prime is 2504530649. The reversal of 2504530621 is 1260354052.

It is an a-pointer prime, because the next prime (2504530649) can be obtained adding 2504530621 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2420148025 + 84382596 = 49195^2 + 9186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2504530621 - 2⁷ = 2504530493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2504530621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2504530921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252265310 + 1252265311.

It is an arithmetic number, because the mean of its divisors is an integer number (1252265311).

Almost surely, 2^2504530621 is an apocalyptic number.

It is an amenable number.

2504530621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2504530621 is an equidigital number, since it uses as much as digits as its factorization.

2504530621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2504530621 is about 50045.2857020519. The cubic root of 2504530621 is about 1358.0281800253.

Adding to 2504530621 its reverse (1260354052), we get a palindrome (3764884673).

The spelling of 2504530621 in words is "two billion, five hundred four million, five hundred thirty thousand, six hundred twenty-one".