2516426621 has 2 divisors, whose sum is σ = 2516426622. Its totient is φ = 2516426620.

The previous prime is 2516426617. The next prime is 2516426623. The reversal of 2516426621 is 1266246152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1665537721 + 850888900 = 40811^2 + 29170^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516426621 - 2² = 2516426617 is a prime.

Together with 2516426623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2516426623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258213310 + 1258213311.

It is an arithmetic number, because the mean of its divisors is an integer number (1258213311).

Almost surely, 2^2516426621 is an apocalyptic number.

It is an amenable number.

2516426621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516426621 is an equidigital number, since it uses as much as digits as its factorization.

2516426621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 2516426621 is about 50163.9972589904. The cubic root of 2516426621 is about 1360.1749019940.

The spelling of 2516426621 in words is "two billion, five hundred sixteen million, four hundred twenty-six thousand, six hundred twenty-one".