51725489 has 2 divisors, whose sum is σ = 51725490. Its totient is φ = 51725488.

The previous prime is 51725461. The next prime is 51725491. The reversal of 51725489 is 98452715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51724864 + 625 = 7192^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 51725489 - 2²⁴ = 34948273 is a prime.

Together with 51725491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51725419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25862744 + 25862745.

It is an arithmetic number, because the mean of its divisors is an integer number (25862745).

Almost surely, 2^51725489 is an apocalyptic number.

It is an amenable number.

51725489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51725489 is an equidigital number, since it uses as much as digits as its factorization.

51725489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 51725489 is about 7192.0434509255. The cubic root of 51725489 is about 372.5931517856.

The spelling of 51725489 in words is "fifty-one million, seven hundred twenty-five thousand, four hundred eighty-nine".