51499 has 6 divisors (see below), whose sum is σ = 59964. Its totient is φ = 44100.

The previous prime is 51487. The next prime is 51503. The reversal of 51499 is 99415.

51499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51499 - 2¹¹ = 49451 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 477 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (9994).

2⁵¹⁴⁹⁹ is an apocalyptic number.

51499 is a deficient number, since it is larger than the sum of its proper divisors (8465).

51499 is a wasteful number, since it uses less digits than its factorization.

51499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1058 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 51499 is about 226.9339110843. The cubic root of 51499 is about 37.2048534925.

The spelling of 51499 in words is "fifty-one thousand, four hundred ninety-nine".