31030 has 16 divisors (see below), whose sum is σ = 58320.
Its totient is φ = 11872.
The previous prime is 31019. The next prime is 31033. The reversal of 31030 is 3013.
31030 = T31 + T32 + ... +
It is a happy number.
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 (31033) by changing a digit.
31030 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237 + ... + 343.
It is an arithmetic number, because the mean of its divisors is an integer number (3645).
231030 is an apocalyptic number.
31030 is a deficient number, since it is larger than the sum of its proper divisors (27290).
31030 is a wasteful number, since it uses less digits than its factorization.
31030 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 143.
The product of its (nonzero) digits is 9, while the sum is 7.
The square root of 31030 is about 176.1533422902.
The cubic root of 31030 is about 31.4239367428.
Adding to 31030 its reverse (3013), we get a palindrome (34043).
The spelling of 31030 in words is "thirty-one thousand, thirty".