2516313421 has 2 divisors, whose sum is σ = 2516313422. Its totient is φ = 2516313420.

The previous prime is 2516313347. The next prime is 2516313433. The reversal of 2516313421 is 1243136152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489110921 + 1027202500 = 38589^2 + 32050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516313421 - 2¹⁷ = 2516182349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2516313421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2516313221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258156710 + 1258156711.

It is an arithmetic number, because the mean of its divisors is an integer number (1258156711).

Almost surely, 2^2516313421 is an apocalyptic number.

It is an amenable number.

2516313421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516313421 is an equidigital number, since it uses as much as digits as its factorization.

2516313421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 2516313421 is about 50162.8689470608. The cubic root of 2516313421 is about 1360.1545061271.

Adding to 2516313421 its reverse (1243136152), we get a palindrome (3759449573).

The spelling of 2516313421 in words is "two billion, five hundred sixteen million, three hundred thirteen thousand, four hundred twenty-one".