45831 has 4 divisors (see below), whose sum is σ = 61112. Its totient is φ = 30552.

The previous prime is 45827. The next prime is 45833. The reversal of 45831 is 13854.

Added to its reverse (13854) it gives a triangular number (59685 = T₃₄₅).

45831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 45831 - 2² = 45827 is a prime.

It is a super-2 number, since 2×45831² = 4200961122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

45831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 45798 and 45807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7636 + ... + 7641.

It is an arithmetic number, because the mean of its divisors is an integer number (15278).

2⁴⁵⁸³¹ is an apocalyptic number.

45831 is a deficient number, since it is larger than the sum of its proper divisors (15281).

45831 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 45831 = (31485)₁₁.

45831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15280.

The product of its digits is 480, while the sum is 21.

The square root of 45831 is about 214.0817600825. The cubic root of 45831 is about 35.7865455095.

Adding to 45831 its reverse (13854), we get a triangular number (59685 = T₃₄₅).

The spelling of 45831 in words is "forty-five thousand, eight hundred thirty-one".