31330300212 has 72 divisors (see below), whose sum is σ = 83887719552. Its totient is φ = 9825235200.

The previous prime is 31330300201. The next prime is 31330300213. The reversal of 31330300212 is 21200303313.

31330300212 is a `hidden beast` number, since 31 + 330 + 300 + 2 + 1 + 2 = 666.

It is a super-2 number, since 2×31330300212² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330300213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1809637 + ... + 1826867.

It is an arithmetic number, because the mean of its divisors is an integer number (1165107216).

Almost surely, 2^31330300212 is an apocalyptic number.

It is an amenable number.

31330300212 is an abundant number, since it is smaller than the sum of its proper divisors (52557419340).

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

31330300212 is a wasteful number, since it uses less digits than its factorization.

31330300212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20229 (or 20224 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31330300212 its reverse (21200303313), we get a palindrome (52530603525).

The spelling of 31330300212 in words is "thirty-one billion, three hundred thirty million, three hundred thousand, two hundred twelve".