51478 has 8 divisors (see below), whose sum is σ = 88272. Its totient is φ = 22056.

The previous prime is 51473. The next prime is 51479. The reversal of 51478 is 87415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1825 + ... + 1852.

It is an arithmetic number, because the mean of its divisors is an integer number (11034).

2⁵¹⁴⁷⁸ is an apocalyptic number.

51478 is a deficient number, since it is larger than the sum of its proper divisors (36794).

51478 is a wasteful number, since it uses less digits than its factorization.

51478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686.

The product of its digits is 1120, while the sum is 25.

The square root of 51478 is about 226.8876373891. The cubic root of 51478 is about 37.1997957363.

Subtracting 51478 from its reverse (87415), we obtain a cube (35937 = 33³).

It can be divided in two parts, 51 and 478, that added together give a square (529 = 23²).

The spelling of 51478 in words is "fifty-one thousand, four hundred seventy-eight".