51455439 has 96 divisors (see below), whose sum is σ = 98496000. Its totient is φ = 26345088.

The previous prime is 51455431. The next prime is 51455441. The reversal of 51455439 is 93455415.

51455439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51455439 - 2³ = 51455431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51455431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 578107 + ... + 578195.

It is an arithmetic number, because the mean of its divisors is an integer number (1026000).

Almost surely, 2^51455439 is an apocalyptic number.

51455439 is a deficient number, since it is larger than the sum of its proper divisors (47040561).

51455439 is a wasteful number, since it uses less digits than its factorization.

51455439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 141 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 51455439 is about 7173.2446633305. The cubic root of 51455439 is about 371.9436048745.

The spelling of 51455439 in words is "fifty-one million, four hundred fifty-five thousand, four hundred thirty-nine".