51552439 has 2 divisors, whose sum is σ = 51552440. Its totient is φ = 51552438.

The previous prime is 51552437. The next prime is 51552463. The reversal of 51552439 is 93425515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51552439 - 2¹ = 51552437 is a prime.

Together with 51552437, 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 (51552437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25776219 + 25776220.

It is an arithmetic number, because the mean of its divisors is an integer number (25776220).

Almost surely, 2^51552439 is an apocalyptic number.

51552439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51552439 is an equidigital number, since it uses as much as digits as its factorization.

51552439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 34.

The square root of 51552439 is about 7180.0027158769. The cubic root of 51552439 is about 372.1771783847.

The spelling of 51552439 in words is "fifty-one million, five hundred fifty-two thousand, four hundred thirty-nine".