31323012 has 48 divisors (see below), whose sum is σ = 84911232. Its totient is φ = 8801280.

The previous prime is 31322983. The next prime is 31323023. The reversal of 31323012 is 21032313.

It is a super-2 number, since 2×31323012² = 1962262161504288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31322982 and 31323000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2068 + ... + 8180.

It is an arithmetic number, because the mean of its divisors is an integer number (1768984).

Almost surely, 2^31323012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31323012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42455616).

31323012 is an abundant number, since it is smaller than the sum of its proper divisors (53588220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31323012 is a wasteful number, since it uses less digits than its factorization.

31323012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6188 (or 6186 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31323012 is about 5596.6965256301. The cubic root of 31323012 is about 315.2253766276.

Adding to 31323012 its reverse (21032313), we get a palindrome (52355325).

The spelling of 31323012 in words is "thirty-one million, three hundred twenty-three thousand, twelve".