Search a number
BaseRepresentation
bin111110111111
312112022
4332333
5112111
630355
714516
oct7677
95468
104031
113035
1223bb
131ab1
14167d
1512db
hexfbf

4031 has 4 divisors (see below), whose sum is σ = 4200. Its totient is φ = 3864.

The previous prime is 4027. The next prime is 4049. The reversal of 4031 is 1304.

Adding to 4031 its reverse (1304), we get a palindrome (5335).

It can be divided in two parts, 403 and 1, that added together give a palindrome (404).

4031 is nontrivially palindromic in base 16.

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

It is a cyclic number.

It is not a de Polignac number, because 4031 - 22 = 4027 is a prime.

It is a super-2 number, since 2×40312 = 32497922, which contains 22 as substring.

It is a Duffinian number.

4031 is an undulating number in base 16.

It is a plaindrome in base 12 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41 + ... + 98.

It is an arithmetic number, because the mean of its divisors is an integer number (1050).

4031 is a deficient number, since it is larger than the sum of its proper divisors (169).

4031 is a wasteful number, since it uses less digits than its factorization.

4031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 4031 is about 63.4901567174. The cubic root of 4031 is about 15.9149128970.

The spelling of 4031 in words is "four thousand, thirty-one".

Divisors: 1 29 139 4031