5125026821 has 2 divisors, whose sum is σ = 5125026822. Its totient is φ = 5125026820.

The previous prime is 5125026811. The next prime is 5125026833. The reversal of 5125026821 is 1286205215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3238861921 + 1886164900 = 56911^2 + 43430^2 .

It is a cyclic number.

It is not a de Polignac number, because 5125026821 - 2³⁰ = 4051284997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5125026811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2562513410 + 2562513411.

It is an arithmetic number, because the mean of its divisors is an integer number (2562513411).

Almost surely, 2^5125026821 is an apocalyptic number.

It is an amenable number.

5125026821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5125026821 is an equidigital number, since it uses as much as digits as its factorization.

5125026821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 5125026821 is about 71589.2926421263. The cubic root of 5125026821 is about 1724.1116278165. Note that the first 3 decimals are identical.

The spelling of 5125026821 in words is "five billion, one hundred twenty-five million, twenty-six thousand, eight hundred twenty-one".