51488839 has 2 divisors, whose sum is σ = 51488840. Its totient is φ = 51488838.

The previous prime is 51488837. The next prime is 51488851. The reversal of 51488839 is 93888415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51488839 - 2¹ = 51488837 is a prime.

It is a super-2 number, since 2×51488839² = 5302201083135842, which contains 22 as substring.

Together with 51488837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51488837) 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, 25744419 + 25744420.

It is an arithmetic number, because the mean of its divisors is an integer number (25744420).

Almost surely, 2^51488839 is an apocalyptic number.

51488839 is a deficient number, since it is larger than the sum of its proper divisors (1).

51488839 is an equidigital number, since it uses as much as digits as its factorization.

51488839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 51488839 is about 7175.5723813505. The cubic root of 51488839 is about 372.0240643276.

The spelling of 51488839 in words is "fifty-one million, four hundred eighty-eight thousand, eight hundred thirty-nine".