51494 has 4 divisors (see below), whose sum is σ = 77244. Its totient is φ = 25746.

The previous prime is 51487. The next prime is 51503. The reversal of 51494 is 49415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49415 = 5 ⋅9883.

It is a plaindrome in base 8.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12872 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (19311).

2⁵¹⁴⁹⁴ is an apocalyptic number.

51494 is a deficient number, since it is larger than the sum of its proper divisors (25750).

51494 is a wasteful number, since it uses less digits than its factorization.

51494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25749.

The product of its digits is 720, while the sum is 23.

The square root of 51494 is about 226.9228943937. The cubic root of 51494 is about 37.2036493895.

It can be divided in two parts, 51 and 494, that added together give a palindrome (545).

The spelling of 51494 in words is "fifty-one thousand, four hundred ninety-four".