2521303403 has 2 divisors, whose sum is σ = 2521303404. Its totient is φ = 2521303402.

The previous prime is 2521303387. The next prime is 2521303417. The reversal of 2521303403 is 3043031252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521303403 - 2⁴ = 2521303387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521303453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260651701 + 1260651702.

It is an arithmetic number, because the mean of its divisors is an integer number (1260651702).

Almost surely, 2^2521303403 is an apocalyptic number.

2521303403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521303403 is an equidigital number, since it uses as much as digits as its factorization.

2521303403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 2521303403 is about 50212.5821184292. The cubic root of 2521303403 is about 1361.0529984690.

Adding to 2521303403 its reverse (3043031252), we get a palindrome (5564334655).

The spelling of 2521303403 in words is "two billion, five hundred twenty-one million, three hundred three thousand, four hundred three".