31056 has 20 divisors (see below), whose sum is σ = 80352. Its totient is φ = 10336.
The previous prime is 31051. The next prime is 31063. The reversal of 31056 is 65013.
It is a plaindrome in base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (31051) by changing a digit.
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 in 3 ways as a sum of consecutive naturals, for example, 276 + ... + 371.
231056 is an apocalyptic number.
It is an amenable number.
31056 is an abundant number, since it is smaller than the sum of its proper divisors (49296).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40176).
31056 is a wasteful number, since it uses less digits than its factorization.
31056 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 658 (or 652 counting only the distinct ones).
The product of its (nonzero) digits is 90, while the sum is 15.
The square root of 31056 is about 176.2271261753. The cubic root of 31056 is about 31.4327109856.
Adding to 31056 its reverse (65013), we get a palindrome (96069).
The spelling of 31056 in words is "thirty-one thousand, fifty-six".
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