51487798 has 16 divisors (see below), whose sum is σ = 82173744. Its totient is φ = 24111360.

The previous prime is 51487771. The next prime is 51487817. The reversal of 51487798 is 89778415.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3586 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (5135859).

Almost surely, 2^51487798 is an apocalyptic number.

51487798 is a deficient number, since it is larger than the sum of its proper divisors (30685946).

51487798 is a wasteful number, since it uses less digits than its factorization.

51487798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407.

The product of its digits is 564480, while the sum is 49.

The square root of 51487798 is about 7175.4998432165. The cubic root of 51487798 is about 372.0215571197.

It can be divided in two parts, 5148 and 7798, that multiplied together give a palindrome (40144104).

The spelling of 51487798 in words is "fifty-one million, four hundred eighty-seven thousand, seven hundred ninety-eight".