31043 has 4 divisors (see below), whose sum is σ = 31920. Its totient is φ = 30168.
The previous prime is 31039. The next prime is 31051. The reversal of 31043 is 34013.
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 31043 - 22 = 31039 is a prime.
It is a Duffinian number.
It is a plaindrome in base 13.
It is not an unprimeable number, because it can be changed into a prime (31013) 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, 383 + ... + 456.
It is an arithmetic number, because the mean of its divisors is an integer number (7980).
231043 is an apocalyptic number.
31043 is a deficient number, since it is larger than the sum of its proper divisors (877).
31043 is an equidigital number, since it uses as much as digits as its factorization.
31043 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 876.
The product of its (nonzero) digits is 36, while the sum is 11.
The square root of 31043 is about 176.1902380951. The cubic root of 31043 is about 31.4283244766.
Adding to 31043 its reverse (34013), we get a palindrome (65056).
It can be divided in two parts, 310 and 43, that added together give a palindrome (353).
The spelling of 31043 in words is "thirty-one thousand, forty-three".
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