31012 has 6 divisors (see below), whose sum is σ = 54278. Its totient is φ = 15504.

The previous prime is 30983. The next prime is 31013. The reversal of 31012 is 21013.

It can be written as a sum of positive squares in only one way, i.e., 30976 + 36 = 176^2 + 6^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 8 and base 14.

It is a junction number, because it is equal to n+sod(n) for n = 30986 and 31004.

It is not an unprimeable number, because it can be changed into a prime (31013) by changing a digit.

31012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 3873 + ... + 3880.

2³¹⁰¹² is an apocalyptic number.

It is an amenable number.

31012 is a deficient number, since it is larger than the sum of its proper divisors (23266).

31012 is a wasteful number, since it uses less digits than its factorization.

31012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7757 (or 7755 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 31012 is about 176.1022430294. The cubic root of 31012 is about 31.4178593954.

Adding to 31012 its reverse (21013), we get a palindrome (52025).

Subtracting from 31012 its reverse (21013), we obtain a palindrome (9999).

The spelling of 31012 in words is "thirty-one thousand, twelve".