5168021 has 2 divisors, whose sum is σ = 5168022. Its totient is φ = 5168020.

The previous prime is 5167991. The next prime is 5168047. The reversal of 5168021 is 1208615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 1322500 = 1961^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 5168021 - 2⁶ = 5167957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5168071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584010 + 2584011.

It is an arithmetic number, because the mean of its divisors is an integer number (2584011).

Almost surely, 2^5168021 is an apocalyptic number.

It is an amenable number.

5168021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5168021 is an equidigital number, since it uses as much as digits as its factorization.

5168021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 5168021 is about 2273.3281769247. The cubic root of 5168021 is about 172.8919436146.

The spelling of 5168021 in words is "five million, one hundred sixty-eight thousand, twenty-one".