5239725221 has 2 divisors, whose sum is σ = 5239725222. Its totient is φ = 5239725220.

The previous prime is 5239725199. The next prime is 5239725223. The reversal of 5239725221 is 1225279325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5218473121 + 21252100 = 72239^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 5239725221 - 2¹⁸ = 5239463077 is a prime.

Together with 5239725223, 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 (5239725223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619862610 + 2619862611.

It is an arithmetic number, because the mean of its divisors is an integer number (2619862611).

Almost surely, 2^5239725221 is an apocalyptic number.

It is an amenable number.

5239725221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5239725221 is an equidigital number, since it uses as much as digits as its factorization.

5239725221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 5239725221 is about 72385.9462948437. The cubic root of 5239725221 is about 1736.8787595705.

The spelling of 5239725221 in words is "five billion, two hundred thirty-nine million, seven hundred twenty-five thousand, two hundred twenty-one".