5251020217 has 2 divisors, whose sum is σ = 5251020218. Its totient is φ = 5251020216.

The previous prime is 5251020161. The next prime is 5251020241. The reversal of 5251020217 is 7120201525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3755728656 + 1495291561 = 61284^2 + 38669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5251020217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5251020191 and 5251020200.

It is not a weakly prime, because it can be changed into another prime (5251024217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625510108 + 2625510109.

It is an arithmetic number, because the mean of its divisors is an integer number (2625510109).

Almost surely, 2^5251020217 is an apocalyptic number.

It is an amenable number.

5251020217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5251020217 is an equidigital number, since it uses as much as digits as its factorization.

5251020217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 5251020217 is about 72463.9235551043. The cubic root of 5251020217 is about 1738.1258961507.

It can be divided in two parts, 52510 and 20217, that added together give a palindrome (72727).

The spelling of 5251020217 in words is "five billion, two hundred fifty-one million, twenty thousand, two hundred seventeen".