51538487 has 16 divisors (see below), whose sum is σ = 69199872. Its totient is φ = 37069920.

The previous prime is 51538471. The next prime is 51538489. The reversal of 51538487 is 78483515.

51538487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51538487 - 2⁴ = 51538471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538489) 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 15 ways as a sum of consecutive naturals, for example, 24743 + ... + 26744.

It is an arithmetic number, because the mean of its divisors is an integer number (4324992).

Almost surely, 2^51538487 is an apocalyptic number.

51538487 is a deficient number, since it is larger than the sum of its proper divisors (17661385).

51538487 is a wasteful number, since it uses less digits than its factorization.

51538487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51518.

The product of its digits is 134400, while the sum is 41.

The square root of 51538487 is about 7179.0310627549. The cubic root of 51538487 is about 372.1436003775.

It can be divided in two parts, 51538 and 487, that added together give a palindrome (52025).

The spelling of 51538487 in words is "fifty-one million, five hundred thirty-eight thousand, four hundred eighty-seven".