51488609 has 2 divisors, whose sum is σ = 51488610. Its totient is φ = 51488608.

The previous prime is 51488581. The next prime is 51488611. The reversal of 51488609 is 90688415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47224384 + 4264225 = 6872^2 + 2065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51488609 is a prime.

Together with 51488611, 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 (51488669) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25744304 + 25744305.

It is an arithmetic number, because the mean of its divisors is an integer number (25744305).

Almost surely, 2^51488609 is an apocalyptic number.

It is an amenable number.

51488609 is a deficient number, since it is larger than the sum of its proper divisors (1).

51488609 is an equidigital number, since it uses as much as digits as its factorization.

51488609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 51488609 is about 7175.5563547365. The cubic root of 51488609 is about 372.0235103845.

The spelling of 51488609 in words is "fifty-one million, four hundred eighty-eight thousand, six hundred nine".