51485 has 8 divisors (see below), whose sum is σ = 70656. Its totient is φ = 35280.

The previous prime is 51481. The next prime is 51487. The reversal of 51485 is 58415.

51485 = T₁₄₁ + T₁₄₂ + ... + T₁₄₅.

51485 = 20² + 21² + ... + 54².

51485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51485 - 2² = 51481 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 51485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (8832).

2⁵¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

51485 is a deficient number, since it is larger than the sum of its proper divisors (19171).

51485 is a wasteful number, since it uses less digits than its factorization.

51485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483.

The product of its digits is 800, while the sum is 23.

The square root of 51485 is about 226.9030630027. The cubic root of 51485 is about 37.2014818079.

The spelling of 51485 in words is "fifty-one thousand, four hundred eighty-five".