31230323212 has 48 divisors (see below), whose sum is σ = 63838121760. Its totient is φ = 13210419200.

The previous prime is 31230323207. The next prime is 31230323227. The reversal of 31230323212 is 21232303213.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167989 + ... + 301132.

It is an arithmetic number, because the mean of its divisors is an integer number (1329960870).

Almost surely, 2^31230323212 is an apocalyptic number.

It is an amenable number.

31230323212 is an abundant number, since it is smaller than the sum of its proper divisors (32607798548).

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

31230323212 is a wasteful number, since it uses less digits than its factorization.

31230323212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469242 (or 469240 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31230323212 its reverse (21232303213), we get a palindrome (52462626425).

The spelling of 31230323212 in words is "thirty-one billion, two hundred thirty million, three hundred twenty-three thousand, two hundred twelve".