2516202432421 has 2 divisors, whose sum is σ = 2516202432422. Its totient is φ = 2516202432420.

The previous prime is 2516202432371. The next prime is 2516202432437. The reversal of 2516202432421 is 1242342026152.

2516202432421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2316974109921 + 199228322500 = 1522161^2 + 446350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516202432421 - 2⁹ = 2516202431909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2516202232421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258101216210 + 1258101216211.

It is an arithmetic number, because the mean of its divisors is an integer number (1258101216211).

Almost surely, 2^{2516202432421} is an apocalyptic number.

It is an amenable number.

2516202432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516202432421 is an equidigital number, since it uses as much as digits as its factorization.

2516202432421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 2516202432421 its reverse (1242342026152), we get a palindrome (3758544458573).

The spelling of 2516202432421 in words is "two trillion, five hundred sixteen billion, two hundred two million, four hundred thirty-two thousand, four hundred twenty-one".