5216018021 has 2 divisors, whose sum is σ = 5216018022. Its totient is φ = 5216018020.

The previous prime is 5216018011. The next prime is 5216018063. The reversal of 5216018021 is 1208106125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3810592900 + 1405425121 = 61730^2 + 37489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5216018021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5216018011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608009010 + 2608009011.

It is an arithmetic number, because the mean of its divisors is an integer number (2608009011).

Almost surely, 2^5216018021 is an apocalyptic number.

It is an amenable number.

5216018021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216018021 is an equidigital number, since it uses as much as digits as its factorization.

5216018021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 5216018021 is about 72222.0051023232. The cubic root of 5216018021 is about 1734.2552893057.

The spelling of 5216018021 in words is "five billion, two hundred sixteen million, eighteen thousand, twenty-one".