31228481212 has 12 divisors (see below), whose sum is σ = 54652590216. Its totient is φ = 15613455440.

The previous prime is 31228481209. The next prime is 31228481213. The reversal of 31228481212 is 21218482213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31228481213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101743 + ... + 269830.

It is an arithmetic number, because the mean of its divisors is an integer number (4554382518).

Almost surely, 2^31228481212 is an apocalyptic number.

It is an amenable number.

31228481212 is a deficient number, since it is larger than the sum of its proper divisors (23424109004).

31228481212 is a wasteful number, since it uses less digits than its factorization.

31228481212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392588 (or 392586 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The spelling of 31228481212 in words is "thirty-one billion, two hundred twenty-eight million, four hundred eighty-one thousand, two hundred twelve".