5216420081 has 2 divisors, whose sum is σ = 5216420082. Its totient is φ = 5216420080.

The previous prime is 5216420071. The next prime is 5216420123. The reversal of 5216420081 is 1800246125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4840680625 + 375739456 = 69575^2 + 19384^2 .

It is a cyclic number.

It is not a de Polignac number, because 5216420081 - 2¹⁸ = 5216157937 is a prime.

It is a super-2 number, since 2×5216420081² = 54422076922920093122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5216420071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608210040 + 2608210041.

It is an arithmetic number, because the mean of its divisors is an integer number (2608210041).

Almost surely, 2^5216420081 is an apocalyptic number.

It is an amenable number.

5216420081 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216420081 is an equidigital number, since it uses as much as digits as its factorization.

5216420081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 5216420081 is about 72224.7885493616. The cubic root of 5216420081 is about 1734.2998479942.

The spelling of 5216420081 in words is "five billion, two hundred sixteen million, four hundred twenty thousand, eighty-one".